When should I [18/F] tell him [21/M] that I'm a virgin?

I'm currently casually dating a guy I matched on tinder with about 3 months ago. We've only hung out twice now, met up last week, but we had our first kiss/makeout session the last time we hung out. He's been busy so we haven't been able to meet up since then. We've talked about it and he's told me that he's still interested and we've been pretty flirty. He's told me that he feels great about relationships and would want to be in one if he meets the right person.

We've both sent some pretty suggestive texts about when we meet up again but I'm a virgin, and I haven't told him that. I'm kind of scared that its too late to let him know now. How do I bring this up to him? Will this be a dealbreaker?

TL;DR: Casually dating an older guy. I'm a virgin and I'm not sure how to bring this up. I want to eventually be in a relationship with him but don't wanna scare him off