<human>: Met a girl, got to know her, really liked her and eventually learned she had a boyfriend. We stayed close over the course of 4-5 months and eventually when she became single we got together and we're now a couple. 

I've known her for 6 months, she was with her boyfriend for 4 and they've been apart for 2. I made sure she was totally over him before we "got together" and so far things are great between us.

Basically as I said, everything is going great but I can't get thoughts of those 2 out of my head... especially the idea that they were intimate.

I know i'm being immature, but I've never really _known_ about any of my ex's past partners. I knew this guy and he was a real psycho, so I guess it pisses me off inside to know that there was a time when she trusted him 100% and gave him her everything, even though he was such an asshole.

Luckily I don't live near him nor do I ever have to see him, neither does she, so my life isn't affected in _any_ way by him. I'm just new to love, and haven't really been in many relationships. I just wanna know how you guys get over the fact that your SO was someone else's SO at one point and shared all the same things you share together.

Provide a brief overview of the text.
<bot>: Wanna try and get thoughts of my SO being with her ex out of my head. Can't stop reminding myself that only a few months ago she was intimate with someone else.