Crushin'

So I was dating this guy and we broke up. We're "together" again but he hasn't made it official even though it's been 4 months and it's really starting to piss me off. I feel like he's just waiting to bounce at any moment. You know? Come to find out his mom all of a sudden doesn't like me and therefore his sister doesn't either. And guess why his mom doesn't like me. Because I told her to talk to her son when she came to me about something that wasn't my place to discuss with her, & she said I tried to tell her how to parents. LOL GIVE ME A BREAK. So first: how the hell do I apologize and make amends with this wacko? 
Second: in the same little strip mall that I work I met this guy and I am straight crushing on him. He has a girlfriend and obviously I'm with this other guy, but we had to have a seriously heart to heart today about our boundaries because were so interested in each other. Then as I was leaving his store he asked me to think about potentially starting something with the two of us. What do I do?! I really care about the guy I'm with, but I'm done with his family bullshit. I mean, they treat me like straight trash and constantly talk behind my back. I don't get it at all. It's frustrating and I'm just done. Like gosh. I'm done. But this other guy that I'm kind of into, has a girlfriend. And maye I'm just that damn special that he would leave her for me, or maybe he would do the same thing to me if a better option came about. You know? I'm at a loss. Please, ladies, HELP.