overwhelmed

Okay okay, first of all I know I'm probably gonna get judged for this but at this moment that's the least of my worries. So this guy I work with and I have this strong attraction, like it's so strong and we are great friends and yes we have slept together twice. Your probably all thinking well what's stopping you, his girlfriend who recently just found out she was pregnant. He told me before that he put allot into the relationship and he wasn't happy about how it has turned out. Help me.