Oral...

Okay so I've been with my boyfriend for a little over a year and we've had sex and we've both given each other oral. We are very comfortable with ourselves and each other. I just feel like he goes down on me wayyy more than I do him, and the problem isn't that I don't want to give him oral because I actually don't mind doing it. I just feel weird trying to start the process of actually going down on him. I don't just want to be kissing him and getting him in the mood and then unzip him and go at it. It's just weird to me. Any suggestions as of how I hokum start it?