<human>: Hello everyone. New to r/relationships and looking for some advice. 
Will try to keep it as short as possible.

Recently, me and a girl who used to be my best friend became boyfriend and girlfriend after a few months of dating. We were best friends for about a year and then in a drunken haze we ended up hooking up, enjoyed it, kept it going until it eventually turned to something with real feelings and we went from there.

We are both 19 years old. We have been best friends for about a year, dated for three months beginning in February and have been "official" for two weeks. 

I've never gone out with a friend, let alone a best friend. It's always someone I meet and am immediately attracted to and pursuing. I must admit it' very nice! It's comfortable and feels much more mature than previous relationships since there were never any games. We can be ourselves with each other and be open and it's great. 

The one problem is- as we were best friend we know everything about each other. Meaning I know her sexual history. The cold hard facts are that shit went through a period of very low self-esteem and ended up doing some regrettable things. ie. (and this is difficult to even type) sleeping with two guys in one night, various one nights stands, etc. 
Needless to say it's very difficult to deal with.

Let me be clear that I have no doubt in my mind that she loves me. She is very genuine and I can see that- I firmly believe that she would never cheat. But the more that I begin to fall in love with her the more that this knowledge hurts me and angers me. Ultimately, it culminated in a huge outburst last night in which I wanted nothing more than to make her cry... I still feel horrible about it.

How can I deal with this? I want nothing more than to not care about this. But it breaks my heart knowing that the girl that I love put herself in situations like that. I don't want this to haunt me or plague the relationship any more than it already has. If I can't get over it, it would surely fail as quickly as it came. 

Thank you in advanced everyone.

Provide a brief overview of the text.
<bot>: I'm having a hard time dealing with my girlfriends promiscuous past and am seeking advice on how to get over it.