Could anyone enlighten me why after ángel had become human again in Angel:After the fall, he didn't try to get together with Buffy??

i think he did and then he realized that buffy o him might die because he had no strength against demons and rewinded time

Far as I understand it... the senior partners turned ángel into a human to weaken him when L.A was cast into hell. (Which explains why he can't just go rushing into her arms in all effect because his in *hell*) But later doesn't remain human when it returns to normal. I don't know why (Probably because balance was restored again o something), I haven't really read it. Just here and there.

After L.A. came back to earth, he became vampire again. Then became Buffy's "enemy".

when ángel became human he faced a demon without buffy n failed to eliminate him he realize if he get back with buffy he will put her life in danger n burden to her as she is a slayer so he decided to stay away from her
for me this is the most corazón breaking moment on tv

ángel might not want to reapet what happen the last time he became human

He was in Hell is the biggest reason, but I think ángel is waiting for Buffy to say she's ready, He can't be the one to make the first mover it has to be her, because she has to decide she's done baking.