Please help...does this sound like BPD?

Hey all, my name is Peter. I have several diagnosed anxiety disorders, but I think I'm just some kind of psychological mess. I threw around the possibility that I had BPD around five years ago, but my psychologist at the time didn't agree.
The main behavior that makes me wonder if I have BPD is that I become obsessed with women and if they don't like me back I use threats of suicide to get their attention. This has happened with four girls over the past eight or so years. I become obsessed with them, freak them out, then threaten suicide. The last girl was in the last couple of months. Man, I would like to describe the whole thing, but I'm kind of lazy. I would say that I'm very alone because of my social anxiety disorder, so I try to manipulate events so that I end up with a girl the way I want, so then I won't feel so alone anymore.
I just messaged this girl again after not seeing her for a while, saying how I was depressed and get drunk all night (the part about getting drunk was a lie), and told her that if she wanted me to stop messaging her to just tell me. She said: "Please, please, please stop messaging me. I can't respond to these messages. Please stop and please understand. Thank you."
When I can't have the relationships I want to have with people I feel like I have lost someone I've been dating for years (even if I've only known them for a few months) and become depressed. After that suicide threat, I at first wanted to stop talking to her, but then I was hoping we could start over and try being friends. So I kept messaging her, trying to apologize and rationalize what I did. Obviously I need to stop messaging her, but the thought of never seeing her again kind of feels like my guts are being torn out.
I don't want to be a creepy obsessive stalker with these girls, but that's what I become! I want to change. I guess I was afraid I wouldn't be able to get her on my own merit so threatened suicide. Well what happened was, she got mad at me for something, then I flipped out and said her a long message on FB with a little suicidal stuff thrown in.
When I was 12 or 13, I threatened to kill this girl I liked who had made fun of me for being fat. I was partially inspired by a song, which I thought was about a guy killing his girlfriend, but whatever.

I remember one time I liked a girl, and went down into the bathroom and cried loudly hoping everyone would hear me and feel bad for me.

I do thrive on attention. I like to be comforted and held.

What do you guys think? There's something wrong with me.

I'm not currently in therapy. I just started on Nardil for my OCD/SAD/GAD, but I'm not very hopeful that will help in that area. I've been on about 1,000,000 different antidepressants.

What things should I really be looking out for with BPD? Does the type of behavior I described sound like any kind of personality disorder?