GF slept with more than 20 men!

Yesterday I came to know that my gf has slept with 20+ guys (mostly hookups). She said that after her first break up she wanted to forget about her ex and her though process was “to forget someone you have to go under someone”.
Then she got some psychotic episodes. And she started sleeping with many men. She even dated a 32 year old guy when she was 21.
She said that she thought if she sleep with someone they might love her back. But they just used her.

Then come to Jan 22 when she met me. And we started going out. I had just one gf before and that was puppy love. I never slept with anyone before.
Then after 9 months me and my current gf had sex. Then I realized that she was also texting some hot guy and kinda cheating on me. When i asked her she said that she was used to jump from guys to guys and wasnt sure that our relationship will last or not. So she kept backup.

I feel for every problem she has lot of excuses.
But for last 7 months she has been super loyal to me and shown signs for love.

I do love her alot but dont know what to do at this time.

I was nice to her. Bought her presents, date nights. And i feel because of all that she got attached.

I jusr don’t understand how can i ever be special to her. And how can i ever trust this woman. I feel there is nothing left for me from her physical perspective.

Is it possible for her to ever love me?

Buddy, the problem isn’t the people she hooked up with before the relationship, it’s what happens during the relationship, and keeping a backup sounds like a red flag to me 🚩