Help please!! A person i love is struggling because of her past sexual experience(being molestedas a child)

Hello, thanks so much for making this available. This has been a troubling situation for me for a while. I have a very close friend that has been having issues all her life with not being able to control herself sexually by being with multiple people sexually and being unloyal and this is enhanced even more so when she has been drinking. I met her and she promply told me about her being sexually molested as a child. As i grew closer to her and we became more involved she would at the beginning enjoy talking and joking around sexually with me. but then i began to question why she had done certain things that she brought up to me from her past(three somes, cheating on someone with their brother, kissing girls etc). over time she grew very annoyed of me and everytime we would hang out she would be very edgy and unhappy(she told me none of her partners in the past made her feel this way). Eventually she broke things off with me. but jumped right back into trying to find another partner. she found a few and then left for a different country for the summer. over there she met someone else and is now dating him long distance(different countries) and i am still quite close to her and want her to get help. My question is what can I do first of all to reasure her she can change and what should i remind her of when she is struggling? second of all what kind of proffesional help is best for her at this time? since i know that this is a very serious issue that has a trickle down effect into many parts of her life. I am also worried that she doesnt value affection as much as she should and i care for her deeply. Plus is it still okay to be her friend if she is in a relationship and im still in Love with her?? She knows i am and she enjoys being around me more now that shes been back from her trip. I need to know what to do with all of this. it's very much on my mind. Thanks SOOO much for your time i appreciate it with all my heart. take care