Am i gay?

I have been best friends with this guy for the last 5 years, like inseparable. Now, as far as i know, i am completely straight and although i don't have a girlfriend, until recently i watched straight porn and everything and found girls attractive not guys. During these 5 years, i dunno we were both really tight with each other and just over the years developed this i guess, slightly like jokingly sexual friendship maybe. Like if I was in bed at home and i invited him over for pre-drinks before a party he would jump on me and want to hug or if like i was walking somewhere he would run behind me and sort of like hug me super tightly. I'm also apparently "adorably ticklish" and he, among other friends loved holding me down and tickling me which i found fun, though only when friends i knew well did it, otherwise ugh annoying. Anyway, recently he found a girlfriend who he seems to like a lot and they had sex. I have no idea why, but i've like become slightly angry at him for it. I'm also jealous, but what i can't figure out is whether i'm jealous of him having sex as i also want to have sex with a girl, or if in some way i might be angry he's having sex with a girl???
This is really confusing and he still loves doing the stuff with me i talked about. I don't get like a boner or anything when he does it before anyone asks and im really confused why i'm like jealous.

Anyway, in short, best friend of 5 years got girlfriend, had sex, feel jealous. Weird as we're both straight as far as i know.