<human>: Could you distill the essence of the text into 1-3 sentences?

We started off as friends for over a year and shortly after one of my long term relationships ended we started hooking up and are now pretty serious you could say (we say I love you and spend a lot of time together) I am pretty laid back when it comes to relationships but there are some things that bother me. First, he cheated on his last girlfriend with me which gives me minor trust issues. Second, he remains close friends with his ex. Normally this wouldn't bother me but I know for a fact she's still in love with him and they are like perfect together. (however she's in a relationship and he seems sincere when he says he has no romantic interest in her) Third, he is never satisfied with anything...I am afraid that will one day be me too?
<bot>: Got together with boyfriend who cheated on last ex with me and remains close friends with ex who's still in love with him, not sure to trust him