Blow Job

So I'm seeing this new guy, we've known each other since we were 10 and the opportunity to explore the feelings we always had presented itself. This is good because we got to avoid the awkward "let's get to know each other" phase, and also because we know our families and how much we have in common. This however made it so we kind of just jumped into the sexual phase of a relationship. We haven't had sex, but this is my first time having a boyfriend, so making out, etc (I'm 19 by the way). The most I've done for him is given him a hand job, but he expressed some things he likes after I asked him and he said blow jobs. I've always thought of oral sex as a part of sex and I always thought I'd have sex before oral. I've always regarded it as something I wouldn't do, but what are your thoughts on this? I'm very inexperienced and don't really know how I should feel.