I wonder, do you think it would help to check in with your boyfriend about where you each are with your wants and boundaries around sex right now? It sounds a little bit like some of your anxiety around this is coming from the unknowns, and checking in with each other might help with that. Too, talking about sex won't automatically make you want it more. Even if it did, wanting isn't the same thing as doing; you're still the boss of your own decisions, so you get to decide whether sex stays in the "thing I want but am not ready for" category.
In terms of readiness, would it help to have some resources about determining if you're ready for sex or not?
Those feelings you're describing around masturbation are something we've seen users express before. The good news is that arousal isn't something you automatically have to act on. In fact, there are going to be lots of points in your life (heck, you're probably already experiencing them to some degree) where you feel arousal and can't masturbate because you're in class, or at dinner, or super-engrossed in the book you're reading, etc. What do you think would happen in, when you notice that arousal, you do a quick check in with yourself to see if masturbating sounds fun, or if you'd rather focus your energy on something else?