I deleted him off FB, does that seem immature? or would you have done the same?

[H]

I think there is a lot of confusion going on here on both sides. I went though something like this a few years ago with this guy I liked. I was a virgin back then and still am. I believe sometimes being a virgin makes you more conscios of guys. Don't be so hard on yourself. Your new to all this. Being shy is natural. I think the best way foward is to keep communication opens, as there is a chance you might have to work together. By the sound of it this guy is trying to put you at ease, but do you feel depressed in yourself, or is it the situraion getting on top of you? Well it its the situraion, you should retreat for a while away from contact with him, just until you have time to think things over.
Its up to weather you feel comfortable having him on your facebook or not. If it was me I would delated him too, but there are other ways you could of dealt with this. Like taking him of your states updates. So whenever you logged on, you wouldn't see what he is up to ect. Remain strong and stop apologiseing to him. Take Care and good luck