They were mutually attracted to one another but when she found out that he was a vampire they kissed and both agreed a relationship wouldn't work. They began seeing each other again in and on her 17th birthday had sex at his apartment. This “one true moment of happiness” caused him to lose his soul - part of the Gypsy curse placed on him. Buffy killed him, sending him to a hell dimension to save the world. Angel came back, something Buffy at first hid from her friends. They were a couple again but, with some stern advice from Joyce, Angel broke up with her because he knew that he could never give her a normal life. He did show up for one last dance at the Prom. Faith poisoned Angel with an arrow and the only cure was to drain the blood of a Slayer, so Buffy made him feed from her.

Angel left for Los Angeles and Buffy came to see him in an episode. They had sex when he was briefly human. Time was changed by the Powers That Be and Buffy doesn't remember that Angel was human and that they were together again, but he does. She and Angel argued after Faith had gone to prison and he came back to Sunnydale to apologize but ends up fighting with a jealous Riley.

Angel reluctantly accepted that Buffy has a new boyfriend. It seemed Buffy had been able to move on with her life, even if Angel hadn't. Yet when Angel came back to Sunnydale for Joyce's (Buffy's mother) funeral it was obvious that they still had strong feelings for one another.

Angel: "I've been thinking... about our future. And the more I do, the more I feel like us, you and me being together, is unfair to you."

Buffy: "Is this about what the Mayor said? Because he was just trying to shake us up."

Angel: "He was right."

Buffy: "No. No, he wasn't. He's the bad guy."

Angel: "You deserve more. You deserve something outside of demons and darkness. You should be with someone who can take you into the light. Someone who can make love to you."

Buffy: "I don't care about that."

Angel: "You will. And children."

Buffy: "Children? Can you say jumping the gun? I kill my goldfish."

Angel: "Today. But you have no idea how fast it goes, Buffy. Before you know it, you'll want it all, a normal life."

Buffy: "I'll never have a normal life."

Angel: "Right, you'll always be a Slayer. But that's all the more reason why you should have a real relationship instead of this, this freak show. [Buffy is stunned.] I didn't mean that."

Buffy: "I'm gonna go."

Angel: [grabs her arm] "I'm sorry. Buffy, you know how much I love you. It kills me to say this."

Buffy: "Then don't. Who are you to tell me what's right for me? You think I haven't thought about this?"

Angel: "Have you, rationally?"

Buffy: "No. No, of course not. I'm just some swoony little schoolgirl, right?"

Angel: "I'm trying to do what's right here, okay? I'm trying to think with my head instead of my heart."

Buffy: "Heart? You have a heart? It isn't even beating!"

Angel: "Don't."

Buffy: "Don't what? Don't love you? I'm sorry. You know what? I didn't know that I got a choice in that. I'm never gonna change. I can't change. I want my life to be with you."

Buffy and Angel will probably never return together because of Angel's curse so he could never love someone normally and because they belong to two different worlds. However, maybe Angel will be forgiven for all the evil in his past and will become human again. Then they would be able to live happily together for the rest of their lives.