DEAR MISS LONELYHEARTS: My girlfriend and I have been together six years and have broken up seven times. We always get back together within a few weeks because we’re so similar. We can even finish each other’s sentences!

I must admit I’m an interesting guy — intelligent, funny, and I pick up skills fast. My girlfriend is the same. We have tried to stay apart and have looked for other people who are different from us, but that never works out, because we’re always correcting them.

People who don’t know much say we’re perfect for each other because of this sameness. But being virtually identical in many ways isn’t as much fun as you’d think. In fact, sometimes it’s like dating yourself! What can we do to help make things work for the longer haul?

— Almost Like Twins, Westwood

DEAR MISS LONELYHEARTS: My husband has moved down to our basement. This followed a horrible fight where I confronted him with the fact I know he has been seeing a certain woman from his past. She’s the woman who came just before me and I stole him away from her.

He says he now realizes it’s her he loves, and not me. Now his secret is out, he insists he’s going to keep seeing this woman at her place but will still live in our basement to “do right by the children.” How can this teach the children to do right?

My husband also doesn’t want to have sex with me anymore. He says he never really got over this woman I took him away from seven years ago.

He tells me — as if he’s being overly generous — that he will support me and our kids for as long as necessary. That really means until I go back to work nursing and can support the kids, mostly by myself.

DEAR MISS LONELYHEARTS: My boyfriend had too much to drink on the weekend and he told me he wants us to experiment with different sex partners together soon. I thought he was joking. He wasn’t.

He already has a couple in mind and whipped out a photo of them. They were barely dressed. Yikes!

Then I thought, maybe this is God’s way of warning me away from this man.

Now that I’m clearly backing off, my boyfriend is calling and saying he was just kidding when he mentioned experimenting with another couple.

DEAR MISS LONELYHEARTS: I’m shocked to find out my sister has been seeing my ex-boyfriend.

Even though I was the one who dumped him, I feel she has a lot of nerve picking him up and bringing him back into the family.

The other night she literally brought him back home for dinner. I couldn’t stand looking at him right across the table, so I got up and stomped out the door.

Also, I had to wonder how long they had been getting together behind my back.

DEAR MISS LONELYHEARTS: I ran into my ex-wife this week and almost fell over. She looked like she did when she was in her 20s — in shape and thin, shiny black hair in a sexy cut and wearing tight black pants.

But the sight of her was spoiled by a pumped-up muscleman carrying some new lawn furniture to her truck. She just nodded at me, and faintly smiled. They kept right on going, but the guy didn’t go back into the store. He got into her truck and they took off together. He wasn’t store staff after all, and I felt jealous.

The next day I phoned an old friend of hers, knowing she would have my ex’s contact info. The friend warned me she was dating someone new. I said I knew that because I had run into them together the day before.

Big silence. Then the friend said, “Well, you’re braver than I would be, phoning her up right now. Good luck.”

DEAR MISS LONELYHEARTS: I really miss the first version of my husband. We were so in love and he was perfect, but I missed him so badly when he went on his sales trips. He was also lonely thinking about me, and we talked on the phone for hours at night. He would bring home jewelry for me with real stones, and say, “See? I was loving you every minute I was away.”

Then the nightly calls and closeness between us just seemed to peter out. Oddly, he was generally happy, and I was glad for that, but he seemed different — and actually smelled different. He also bought new clothes and started watching different TV shows.

A female friend of mine ran into him in another city where he was doing business, and said my guy seemed very different than the person she knew here at home. He introduced a female “cousin” walking with him, and then they took off quickly. My husband doesn’t have any female cousins. He was clearly cheating.

I decided to search his clothes in the closet. I smelled perfume evidence of another woman and found an earring I didn’t recognize. When he came home, I showed him my finds and his face got red. Then he said that it was my fault because I didn’t want to go on sales trips with him. He said he missed me so badly that he got depressed and needed a “friend.”

DEAR MISS LONELYHEARTS: I’m a gay man and I’ve made it through the university year doing my best to get over a painful break-up. After Christmas, I was finally starting to heal — but I still needed my ex to stay the heck away.

I thought he was respecting that, but I heard this weekend he’s “tired of protecting me” and is going to live his life freely. The worst part is he’s got a new guy and they have rented a cottage at what we used to refer to as “our beach,” for the best months of the summer.

That was too much! I phoned him up and let loose. He said nothing. Finally, he said calmly he’s OK being “just friends” with me, and he suggested I could rent another cottage at the same beach, with his blessing.

Who needs his blessing? Why couldn’t he have found a job far away, like in Mexico? He can speak several languages. How am I expected to be pleasant when he’s around anywhere?