Relationships are hard

So I've been involved and in a decent amount of casual sex in the past, but now I've found a guy and it's going slower, and we've developed feelings for each other. For once in my life I'm not just jumping straight to last base. This may seem like a good thing, but see I'm emotionally retarded. This whole "love" (eugh, even the word makes me cringe) thing doesn't come naturally to me, and I feel myself instinctively pushing the emotions away. He tells me to relax, that this is supposed to be fun, not stressful. He's several years younger and has been involved in heterosexual relationships in the past. So basically, I'm asking how to find the concept of emotional attachment not terrifying, because I'll be honest I get really anxious at the thought of being close to him xD. Thanks again Reddit~F