Person A and Person B:

Person A and person B are really good friends.
Person A develops a love interest in person B.
Person B is not interested.
Person A is rejected and crushed.
Person B feels guilty and is also crushed.
Person A and B have a falling out.
Person A and B fall in again.
Person A and B are friends again.
Person A and B become really good friends like they once were.
Person A and B meet persons C, D, E and F.
Person A becomes really good friends with them almost instantly.
Person B doesnt really like new people and needs time to feel comfortable.
Because person A becomes really good friends instantly and person B still keeps its distance persons C, D, E and F think person B doesnt like them.
Person A develops a love interest in person E.
Person A hooks up with person E.
Person A is distracted by this new found love thingy or whatever the hell it is.
Person B feels ignored by group.
Person B spends less and less time with group, cause their all couply.
Person B finds other people to hang out with and finds a good friend with person X.
Person B figures if person A missed it, it would come find it.
Person X agrees that person B should just let person A be.
Person A never comes to find person B.
Person X tells person B that it doesnt matter.
Person B is upset but understands person As situation.
Person A talks behind person Bs back, saying that person B is being antisocial and has problems.
Person A keeps talking about person Bs back, and is now saying person B is jealous of Person E.
Person A says that person B is an emotional retard.
Person B knows nothing.
Person B is still spending minimal time with person A and co because person B feels a bit weird around them.
Person B finds out.
Person B is pissed off.
Person A comes looking for person B one day when E and co are not around.
Person B tells Person A to fuck off.
Person A and B have a fight.
Person A apologizes.
Person B knows person A is just saying it and doesnt accept the apology.
Person B tells person A to fuck off yet again and walks off.

Conclusion:
Person X is hot.
Person A cant keep it in their pants.
And person B... well, doesnt care.