<human>: My fiance and I are fighting right now and I just feel so cold and distant towards him. It seems like every few months we have the same fight and now I don't even want to try to come to some conclusions because I've tried that so many times and things still haven't changed. 

Back story: We had a rocky start. We met online and saw each other in person a few times but then I moved about 1000 miles away to live with him when I was 18 and depressed and a large part of my family still won't talk to me because of it. We've since moved back to where I'm from and I'm no longer depressed, but I don't think my extended family will ever accept him. Obviously, the odds were against us.

But like all young couples in love we thought we'd beat the odds. Sure, we fought a bit but we were stressed out and living with his family. Then we got our own place but we still fought because we just can't communicate. I'd try to talk to him calmly about things that bother me and he wouldn't really engage. He tends to shut down unless we get to be on the verge of breaking up or something and then he'll open up a bit.

Anyway, this current fight started because he was being sketchy on his computer and he has a history of doing things behind my back; so I confronted him about it and he said that it amuses him when he acts sketchy just to see how I'll react. He's "tested" me in this way before and he genuinely seems to find it funny when I react in a way that he sees as an "overreaction." (He thinks pretty much anything is an overreaction.)

Things aren't always bad, though. He's responsible and we both go to school and split the bills. We have plans for the future. I feel secure with him. If we did split up at some point, it would be messy because of finances and his family is so far away. 

Sorry this is all over the place. I'm trying to give background information. Let me know if something is unclear.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Things with fiance aren't going so great... How do you know when you should keep fighting and trying to change things and when you just aren't right for each other?