Did I ruin my chances of ever being in a realtionship with this boy?

Honestly I would just ask him out yourself!! I mean if he wants to he will say yes he might not even realize that it means that much to you cause he might already think you guys are going out since you already have had sex!! So just do it yourself!!

The sex was a bad choice. Sex changes every relationship, especially the ones where you choose to do it early. You weren't even going out with him the first place, so that guy is probably thinking to himself that you do this often with guys who aren't even in a relationship with you. Or he may be overwhelmed by the fact that he didn't have to go out with you just to get in your pants.

Since you still communicate as a couple, that's a good sign. The label isn't so important to most guys but it is a big symbol in a relationship. Your going to have to tell this guy how you feel about him, and how you want him to be your boyfriend. Sorry to say but your going to have to make the first move on this one. You need to step up and have a serious talk about you two being officially labeled. Believe it or not there are a few ways to ask him if you two can be boyfriend/girlfriend without actually saying those words.

You can talk to him and refer to him as your boyfriend. If you guys are basically going out already, then on the day you met him you could say "it was X months ago since we been going out! I'm so glad to have you as my boyfriend." Or something like that, maybe even a better example, just use your creative thinking. Remember this is only if your scared to ask him.

He might even already refer to himself as 'your boyfriend' already, he is just afraid that you won't claim him. Be careful though, if you guys have had sex since the first month, this guy may only be a friend with 'benefits', which isn't what a girl wants to hear. Either way you dug yourself a hole, and it's risky from here on out so you are going to have to prepare for the worst or the best. He could deny you from being called your boyfriend, or he could accept the fact of your relationship and do what's right.

Just be up front with him - ask him his view on your...relationship/ friendship
but don't let him try and get away with that whole friends with benefits stuff
it'll cause you more pain.

Hey just call him up and ask him what is going on between the two of you. If you don't ask then he may move on and you or him my be hurt in the end.