<human>: Can you succinctly summarize the text in 1-3 sentences?

So I really need help, and I am really asking for a friend. 
My friend and I, we'll call her P, is really really stuck on her ex boyfriend (who we'll call J). They dated for about 5 months in high school, when she was a junior and he was a freshman, yet there wasn't a lot of intimacy. He ended it, and obviously she was upset. The problem is, it's almost two years after the breakup, and she still can't get over him. 

I'm worried for her. I understand what they say about first loves, but I'm not sure what to tell her anymore. She says she still misses him and would take him back, but he's just not interested. She's in college now, where she could meet tons of other potential partners, but she refuses to let anyone in because she can't get over J. 

I would just appreciate some advice on what to tell her, and how to help her move on, because it isn't healthy to be stuck on someone for this long.
<bot>: Friend is really stuck on an ex boyfriend she dated almost two years ago. Looking for advice on how to get her to finally move on.