My fresh girlfriend recently let me know about her sexual past?

Hi,
One month ago I met a Bulgarian girl and things seem (or seemed) to go very well with her. I really like her character, appearance, behaviour to other people and so on. Sex with her is just great. We are both in our 30s. After being single for a year, I started making dreams with her. While having dinner some days ago she asked me I had ever had sex with 2 girls. The answer was no, even if I would like to do it once as an experience. Then I asked her and she told me that at uni times, she used to have foursomes (3 guys and her) and then she shifted to 4somes (2 vs. 2). She told me that she was doing this cuz she had some extra kilos and she couldn't find a boyfriend. She loves sex and for that reason she was having those mini orgies. She said that she was doing this for a period of time (probably some years) and then she realized that what was she doing was not fulfilling her with emotions and thus she stopped it. Since then she was trying to find a boyfriend, she managed to date 3 guys only for some months each. She said that everyone was treating her really badly and she couldn't feel what is love or being in love with someone and so on. Now she met me, who I had 4 long-term relationships (1-3 years each) in my past (and some shorter ones) and she nearly fell in love with me (felt kind of the same even after a month) and she wants to be my girlfriend. The thing that she explained me her past, shows that she is very honest and this is what she told me. She wants to be with one, fall in love, make family bla bla bla.. my problem is that since that day, I cannot cope with her past. I'm having pictures with her and 3 guys having sex and I am getting crazy. I don't know what to do. I like her, but just the thoughts of her past kill me and it hurts a lot cuz she is a nice girl. Please any advice? She I try delete her past in mind or try find another girl?
Thank you
My fresh girlfriend recently let me know about her sexual past?
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