i'm so upset about my friends' relationship. i probably posted about this before but he told me more about whats going on and now i'm depressed for him because i don't want for him to hurt the way i did when this happened to me.

his gf is long-ish distance. she's apparently been going out with this guy from her school and he asked her to their prom and she told my friend (her bf) all about it to stay truthful and he's okay with it... my friend trusts her, but he is worried that she doesn't love him anymore. i'm just afraid and scared for him... its a recipe for disaster...i dont want him to hurt, i dont know what to tell him.Thinking of him makes me think of what pain he would have to go through if she breaks up with him for this other guy...i dont want him to go through that. what do i do?