BEWARE: that post is full of spoilers of Buffy and Angel.
I'm not a Bangel, but I definitely think that Buffy deeply loved Angel, to an incredibly high level. I believe Angel is Buffy's one. The one she loves the most, even after they broke up and he left. She cares about him a lot, and when I see her with Angel, I feel like she loves him more than she will ever love Riley or Spike. He was the only one she truly gave herself to. When she said to Riley "I gave you my body, heart and soul", I felt it was more something she has to say to Angel. To Angel she gave her body, heart and soul. Riley didn't get that much closure with Buffy. For Angel, Buffy would have accepted any pain love-related. She'd always be there, no matter what. Angel was her chevalier servant, her everything. So yeah, I believe she loved Angel.
But!
What I really wonder is: "Did Angel really love Buffy?".
I kind of feel like Buffy was to Angel what Riley was to Buffy: someone he cared about, he loved, but there was that spark missing. I think what Angel had with Cordelia was way closer to real love. With Cordelia, Angel really opened up, became more himself. With Buffy, he was all broody and mysterious guy, while around Cordy he was more acting like a man than like a broody-mysty vampire. I was already not fond of the Angel part of the Bangel in Buffy, but everything went much worse in Angel (the show). Like "I didn't even cry when she died". And I don't remember quite well, but in the first episode, Doyle made a speech about Angel's life in Sunnydale, and I was really left with the feeling that Buffy was just "the hot chick that happens to be a Slayer" to Angel.
And generally, I don't like how Angel acts like Buffy is just is property. He left her. He left her left town. He came back a few times to Sunnydale, and they went all kissy kissy or flirty. He falls in love with Cordelia, and while Cordelia is in the coma, he goes to Sunnydale and has that "You'll always be my girl?" conversation with Buffy. Then Buffy rejects him. Cordy wakes up, Angel is ready to finally be with her. Cordy dies. Angel goes to Italy and is upset because Buffy is seing the Immortal. In the meantime, he's also implicated in a relationship with Nina.
It really makes me feel like to him, Buffy is just the girl he knows will always be there, you know, just in case.
I don't think I made myself very clear.
So to summarize:
Buffy really really loved Angel
but
Angel didn't love Buffy half as much as Buffy loved him, and he certainly loved her three times less than Spike actually really loved Buffy.
And if you guys wonder, I'm no Bangel, or Spuffy, or Briley. I think all Buffy's relationships are flawed, the two never love each other equally (Buffy loved Angel more than he did love her; Spike and Riley loved Buffy more than she did love them. Even tough at some point I believe Spike was as high on Buffy's pedestal as Angel).