So I've been with my boyfriend for 9 months now. He was my first for everything. I always imagined my first time being with someone who also was having their first time. My first will be my last because I only want to have sex with the person I'm marrying and I know it'll be him but the fact that he's had multiple partners before me is kind of bothering me. Like I tried to let it go and let it not get to me but it has. I don't like that he's messed around with several other girls before me. It makes me feel a way that I can't explain. What do I do? I don't want this to be an argument between him and I.