Tryna fuck my best friend even though both of us straight...

So no idea if I should post this considering both of us are underage... Fuck it?he just got cheated on by his girlfriend, so he doesn't really have any type of commitment to anyone, this whole situations weird for me, because both me and him are straight, it's just like he's pretty feminine, has long hair, is attractive, has a really nice ass, and the reason this whole thing started was because he sounds like one of my girlfriends.Around 2 months ago I was stoned and thought it would be fucking funny to call my best friend and ask him to moan over the phone, he busted out into laughter. I on the other hand was really fucking hard. So a couple of days past and I call him privately and ask him if he could do it again for me but this time I was completely serious. He agreed because he didn't really find it gay or anything like that so he does it gives me enough time to bust a nut, this starts to become a regular thing. After about a month of him getting me off I start getting wet dreams where I'm fucking him. I found him totally hot but not in any romantic way. I end up calling him and tell him that I think he's hot and that i seriously want to fuck him, he says maybe sometime during the summer, earlier this week I asked him if I was to fuck him where would I do it? Neither of us could think of a place, my house has paper thin walls and his parents keep a really good close eye on him. I'm 16 and he's 15, anything you guys suggest I do to sway him towards me? Also question for Yall, I'm the bigger guy (hight and weight wise) but he has the longer cock should I be top since I'm just bigger then him in general? Im completely down to such his cock, I just don't want to be the bottom in this.