Too soon for sex?

Ok so I've need dating my boyfriend for about two months now. We've done a lot of "stuff" (handjobs, blowjobs, fingering, ect.) I've slept over his house a few times now but he asked me to sleepover again this weekend but this time it felt more like an invite for sex. I'm 19 and I'm still a virgin, so I'm not sure what the general waiting period is before I should start having sex with him.