How long should you stay in the “talking” phase?

Me

I met this guy back in December on a dating app and we talked for a couple weeks. We later matched on tinder about a month ago and went on a date. Things went great. We saw each other last night too and went to a club and danced and made out. My friend was also there and said that it was pretty clear that he’s really interested in me and that he wants me. We talk everyday too. When would be the best time to ask him about defining the relationship?