Relationship Advice?

So I've been with my boyfriend for well over a year and I've known him for around six years now. However for about a year we didn't talk much. But I've heard from his buddies from high school that he banged this chick. Now honestly that doesn't bother me. I could care less because no stis or anything. But what matters to me is I've found out that he lied to me and almost even got her pregnant. Like it hurts that he would lie to me about it. He keeps saying that he's so glad that I'm his first and I took his virginity and etc. He keeps emphasizing that. But the thing is I didn't and I don't understand why he would lie to me about it. Like is it that important for guys to like give their virginity away? Like yeah I gave mine to him and maybe that's why it's a big deal to him because I guess he just really wants us to both be each other's first. But again we aren't. Why would he lie to me about it?
Relationship Advice?
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