Dear JJ
So much occurs to me just now, especially that you are young and have a whole life to live ahead of you. You would be better off for the rest of your life without this girl.
You have no kids together, which is a blessing. Read others' posts here about their life after a relationship with an alky trying to arrange parental visits.
Lastly, the hands on thighs reminds me of what a teacher told us in high school. He said that if people made out in public, even kissing, they were probably doing more than that in private. Do you really want to be with someone who will be unfaithful to you?
I am glad you reached out for support. We are here for you.