When you fall for a girl how much time to do wish to wait for sex?

I met a guy at birthday party, after the party he asked me if I wanted to go to his home and get drugged ( we did drugs at the birthday party) and said I prefer to go home. Then last week we went out and smoke weed at a park. Now we haven't seen each other for a week although he invited me over his house and I said I couldn't and that I wanted to see him a couple of times more before going and he understood, and we still kept talking on WhatsApp , I liked that he asked what I was doing like he seemed really interested. Now I'm thinking.. after we see each other outside and we are finally at his home, should I have sex with him? Or if I don't have sex with him I may make him more into me , because well I wish someday I'll be his girlfriend , not this year or next bc I don't want to , but u know I mean I see him in that special way
When you fall for a girl how much time to do wish to wait for sex?
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