So, yesterday i found out that the girl I've loved for over 6 years lost her virginity to someone.?

We used to go out unofficially and then officially for about a year, but we didn't do anything cause we were younger at the time. Some time past and we broke up because i had to move a few states away, yet we still remained close friends and kept in contact. Years passed and this girl, essentially being the one person i had felt any remote feelings of attraction to asked if i would be able to visit next year and i readily agreed, and we developed a somewhat open relationship due to distance being an issue. More recently, we've been talking and after a long conversation, she asks "if given the opportunity, would you want to have sex with me?" and i was kind of hesitant because its not very often that this question is asked this and wouldn't know how she would react to my response. So anyways, i respond by saying yea and and she reply's with a yes. After a few friendly questions, i ask, "if given the chance, when would you want to lose your virginity?" but there's an awkward silence and she reply's by saying how she had already lost it to some guy she'd been going out with for awhile (and this all happened a year before we went back to being in a relationship), but regrets it and wishes she had never made that mistake. So my questions are, should i still visit her and lose mine to her? just forgive and forget? or just opt not to go and find somebody else? She said she still loves me and would understand with whatever i decide to do but felt i deserved to know considering after all this time she still too had feelings for me, and as she put it, you cant just stop loving somebody after you've committed so much effort to keeping in touch. I've thought about this for awhile now know it may seem silly but i still honestly love her... so, what would you do in this situation? honest answer would be appreciated (: