Most Helpful Girl
You sayd that now your feelings are not as strong as they used to be. So in time it can actually go away completely if I were in your place id cut all ties with her
Most Helpful Guy
This is your learning age in relationship matters. At your age, hardly people are serious about relationship and most of time it's just showbiz.
Don't take this situation seriously. Girls at your age are mostly childish and more immature compare to guys.
If she is attention freak, don't be surprised that she will leave you for another guy who she thinks might treat her better than you.
At your age, most girls like being attention freak especially if she is popular. Neither boy or girl is going to reject new people in their life for relationship. And we are no one to tell anyone whom she must remain friends with or she don't.
Under 20 world is full of glamor , games and surprises and meeting and making new friends. Girls have a lot of options and subconsciously searches for better men. Same goes for men too.
You don't need to feel bad bro. You need to be confident in this times and overcome your insecurities related to women. Let her do what she wants but be clear to mention her what hurts you in a confident manner without getting angry or agitated.
May be your relationship will fail at some point. Because lack of immaturity is normal at this age and breaking up of relationship/friendship due to insecurity is pretty normal scenario.
You just need to be learner. Whether relationship /friendshipremains or not, you need to display to her that her activities or attention to other guys doesn't shatter your confidence.
You have done your job by letting out your feelings to her. Now she knows it, so be satisfied that you tried from your side. Let that purity remain before the unsatisfaction of not being accepted by her agitates you, angers you and turning the feeling of love in to misery.
Just don't be obsessed of being with her. Be practical. May be she is not right person for you.