Does my potential partner have BPD?

I'm a 26 year old gay guy. I started speaking to a guy online who seemed really nice and charming. He's 21. We were speaking on chat for around three weeks. There were a few things i picked up on while chatting to him: He started insulting me playfully ALL the time. Calling me stuff like 'butt', and saying stuff like 'bite me' as well as starting to beg me to come around and cuddle him. A week or so in he started text messaging me every day at about 1pm. I think he's somewhat obsessed with me.

The worrying thing is that it's constant. He does it all the time. I met up with him last week and he was charming. But he kept calling me things like 'butt' and what not which i found a little odd - not something you do when you first meet somebody. He got right close to me and started almost putting his arm around me, again, something that I felt was a little inappropriate on a first date. I went along with it though and poked him back and whatnot.

In addition, there have been times where he criticises his previous boyfriends as well as his 'f*ck buddies', which he seems to have a few of.

I'm trying to determine as to whether he suffers from Borderline Personality Disorder. He's very full-on, and seems to idolise me even though we've only known each other for such a short period of time.
Could anybody shine some insight onto this?

Thanks.

I'm no therapist, and I can't diagnose him, although I can say he does show some symptoms of having BPD type of behavior. Does he show signs of being extremely sensitive? Has he ever gotten mad at you if you couldn't answer back? There's so much to be considered, however if he's just showing signs of being the obsessive type then that could also just be his personality. Keep an out if he starts pushing you away, or other similar types of behaviors.

And whether he has BPD or not, you should set boundaries and they should be respected. If you aren't comfortable with something he should be willing to respect that. Don't do what he wants just because you want to be nice. if he's worth being with, he will respect you.

I wish you luck with your relationship!

couple of things...

1. his behavior is that of someone who is not mature in the dating department.
2. this isn't really BPD style idealization, it's just someone who operates fast & furious rather than slow and calculating
3. people that use names like you mention he uses for you are signs of insecurity and is using humor to deflect that by trying to win you over with laughter. also another sign of immaturity.
4. someone who mentions AND criticizes pasr relationships and refers to them as f buddies isn't on the ltr track. sounds like someone who moves from 0 to 60 without regard to building and then ends up getting burned because he didn't spend the time getting to know the suitor.
5. you sound as if you might be on a different track. i don't see BPD as a factor here.

Thanks for your replies guys. Let me just add a few additional things:

He mentioned that he once had anorexia, and that he currently has severe trust issues. Also he suffers from OCD (he can't eat odd number of pieces of food such as grapes on a plate, so he'll eat them in twos).

He's obviously has some relatively serious psychological issues. He also tells me off for not coming over to his place for hugs, but i feel that's relatively casual talk.

He mentioned that his previous 10+ boyfriends (and he's only 21) were left because he was figuring out what he wanted. (Or did he just push them away or drive them up the wall?)

In addition, he says he feels emotions more strongly than most people, and that if people truly knew what he was thinking they'd be really scared, so he uses humour. The other day though, when we were talking and I told him i wasn't available on Saturday night, he mentioned how he hates being left on 'thin-ice' and that he feels that I'm not leading the relationship anywhere, which was a bit of a reprimand, given i saw him the previous two weeks. He also mentioned that he has rarely 'voiced' his concern so early in a relationship, and that he usually just keeps things to himself.

He's a very physical kind of person. He enjoys hugging and holding hands. I don't get the feeling of getting pushed away per se, but I'm afraid of this relationship getting any deeper and being drawn into his den of moodiness. Having said that, I really like him, and sometimes he's very mature and insightful. He's clearly not an idiot, but often behaves childishly.

Whether it's simply immaturity or more, I'm not sure.