Does this guy love me or is he using me?? :S?

I'm sorry to say it, but I think he's just using you. It's quite apparent that he can say all he likes to get into your good books over the internet or texting, but when he meets you in public, he doesn't want to know you. Also, since you were getting with his mate, his mate may have told him what you were like, which then could make this guy assume that you're easy. Therefore, if you do have sex with him, there is a very high possibility that he would never talk to you again afterwards. Also, notice that he only said 'love you' after you said it to him, this indicates that he felt pressured into saying it back and didn't really mean it. To put it bluntly, I don't think he's the right guy for you. However, I could be wrong and he could like you, but this is just a womans instinct