[Lamia]

It's really understandable, natural, in fact, that you feel uncomfortable by this. You say "I know I have to do it soon" but really, you don't. If this guy is as understanding and sweet as you say he is, he'll wait. Even once you do decide to do this, it's still something that you should talk over with him and make sure he understands how big of a deal it is to you. If it gets too uncomfortable and you need to stop, then you need to stop, and that's not a bad thing.

Just relax now, take your time, and don't feel rushed or pressured to do anything.