Does he have no friends anywhere or no friends in the area? Has he moved recently and maybe he finds it difficult to connect with others? You should use your time together to get to know him a bit better and find out more about what's bothering you. A word of caution: don't fall in the "pity" trap - if you no longer wish to date him, don't stick around because he says he will be lonely or whatever.
In my view, it may be that the guy is a loner hence the explanation as to why he has no friends. You should try and find out more about him instead of jumping to a conclusion. You can inquire about his life or from people who are not biased but know him to make your own conclusion.
I do find it strange that he has no friends, introduce him to urfriends see how he interacts socially. Then ask ur friends what they think. If dad's in the picture , you will not go wrong their, men seem to know if a guy is no good...good luck.
It's so hard to judge someone, I'm a nice person but I'm too busy for friends. I'm a great person, but I haven't met any people that I think are worth a good friendship to me, but are just better as acquaintances. I don't want to make friends because I'm a future serial killer. I am too shy and insecure to make friends, I just want you girl friend and don't talk to anyone but me.
Why would you be worried he probaly has a social problem i do i have no friends i just sometimes hang out with my niehbor plus that more time to spend with you and ask your friends if there boyfriends have alot of friend they will tell you it sucks because he wont be spending all his time with you.