<human>: Could you distill the essence of the text into 1-3 sentences?

Okay, so my good friend (who has slowly grown apart throughout the years) has brought up her boyfriend from another country. According to both of them (as I have personally spoken to her) she did not want him to come as their long distance had faded over the 5 months they were apart on her end. However, he is just about to go back to his home country and all the while we (as her/his friends) knew there were many difficulties and that they would probably break up. Tonight, he reveals that he has feelings for me (and well, yes I have feelings for him too but have tried and tried and tried to keep him at a distance because he is my friends boyfriend). I too have a significant other (we've been dating for 2+ years). However, I have from the beginning have felt a strong attraction to him but like I said tried to keep him away to prevent anything bad from happening. He leaves in 5 days. I don't know what to do. I really do love my boyfriend but the thought of someone new is also exciting. The other problem is, we'll never know exactly when we'll see each other again. I figure it's just a harmless crush. Just ride it out and make sure everyone's relationship status stays intact. But I'm afraid I will always wonder "What If?". Anyone have ANY advice??? I am truly lost here. I've had minor crushes before that as soon as they came they went away but 3 months is a very long time for a crush? Maybe?
<bot>: My best friend's boyfriend and I have a thing for each other but we both have significant others and he lives on another continent.