Crushed

I am in love with a girl named Sarah and I found out she is still talking to her ex-girlfriend, and I have to choose if I wanna let her continue talking to her or just say you gotta choose me or her, but I dont see how it would be harmful to let them be friends but only friends because she needs to pick me or her to be with but like I said its not just that she is wanting both of us, she's cheating and I dont like that so I told her choose and she asked if I wou;d give her another chance to see if they really arent going to work out and I said sure go for it, But if you get hurt you cant be sad about it. I'm there for her through the ups and downs, Think and thin, happy or sad, I'm gonna be by her side no matter what happens. I'm always there for her and it will always be that way because Sarah's parents dont like the other girl and her parents dont like Sarah so they cant see each other. So I think I just need to let them see how its going to work out for them and then go from there and I'll be there for her when she gets hurt and I will catch her tears because I love her so very much!!!!!