A little background story: I had a huge crush on my guy friend (we’ll call him M) when I was in high school, and apparently he did too but neither of us said anything. Anyway it got around to Prom and he asked another girl (we’ll call her C) because M knew she liked him and that she’d say yes. Then they started dating after that. I was heartbroken when I heard the news.
Anyway he went off to college and for the past 5 years we’ve stayed in contact and remained friends. Also, C & M have continued to date during this 5 year period as well. Anyway M and I reconnected at a party last month while he was in town and we hung out the entire time he was there and after that too- no funny business happened. Then when he went back home (he lives in a different city than me) we were texting all the time. He ended up breaking up with C; I think I had something to do with it but he admitted to me that he’s been thinking about doing it all year. He cares about her but doesn’t “love her” and she’s pressuring him to get married and he doesn’t want to get married at all. Anyway it was really awkward because they still live together and she had kicked him out of the house- he didn’t have anywhere to go and their lease isn’t up until September. Then I guess they talked and now they’re in an open relationship and they’re seeing other people, but they’re not having sex anymore so they’re more like friends. (Do you think that’s true?) Anyway he and I started dating and things are going great- we’re very happy together. 
We take turns commuting to see each other on the weekends, we stay in contact during the week via text/phone call, etc. However I’m concerned about the timing of this evolving relationship, and I’m uncomfortable with the fact he still lives with his kind-of-ex. Is this a bad situation? Am I being used?
