Yes.
Angel will die. Fang will go gay. Max will fall in love with a hobo and abandon the flock. Read it all in angel! (JK but only the angel part :P)
The angel
i do not know if you can fall in love again but it could happen?
Buffy met Angel in Season 1, which is when their relationship began. Their relationship progressed in Season 2, which is when I would say they fell in love.
Yes it can happen, if you love them or/and they love you
It won't happen because they are not real.
It is possible, but I don't think the fallen angel has his sights set on anyone at the moment.
Yes a were wolf can fall in love with a vampire but it is uncommon for it to happen but a friend of mine is a hybrid so her mom is a werewolf that fell for a vampire so it happens just not offen
Well after Buffy he fell in love with Cordelia
she never fully admitted it. although in the end she sort of hinted on it- i guess it's safe to assume that she did in fact, fall in love with Tristan.
Many things can happen if you become a friend with an gay. There is no assurance as to whether he would fall in love. However, it is good to have clear boundaries in your friendship.