Angel's life as a human wasn't the best he had his father constantly having a go at him just because he followed in his fathers footsteps, the to make matters worse his mother called him a drunken whore which caused him to leave home and hit another bar.
At the age of 27 he met Darla a young lady with good looks all she said to Angel was
"I can show you a better life."
Unbeknown to Angel the better life she was on about was becoming a vampire and leaving his human life behind him.
After Darla turned Angel in to a vampire his first taste of blood was his little sister's which finished his change in to a vampire after that he killed his mother then seriously injured his father as his father laid there dieing Angel was gloating by saying
"I told you I would become something and I would be better than you."
After Angel killed his family he went round and killed everyone in his village.
After he was cursed and given his soul back he met a vampire slayer called Buffy Summers.
When Angel met Buffy they helped each other through thick and thin. After that they fell in love but they found the limitations of their relationship meant that they could no longer be together cause of him being a vampire and her being a vampire slayer.
When Angel and Buffy split up he moved to Los Angeles and got a team together. He called the team Angel investigations. He set it up to protect the humans from supernatural beings.
Watching Angel from a distance was his best friend Spike who also fell in love with Buffy Summers but the reason why they split up was because Buffy found out Spike was teasing Drusilla with blood.
After Angel fond out what Spike was doing he stopped being friends with Spike. Now every time they see each other they either try to kill each other or start a war with each other to see who the better vampire is.
When Angel needed help he always run to Willow cause she was always the best person to run to. Even if it was just for a chat.