Should I tell my best friend that Im gay for him?

Long story short: we're both closeted and both like each other. But neither of us have had the courage to tell each other. Problem is, Im not completely sure if he likes me. In fact, im not even 100% sure if he's gay. Some days, Im seriously convinced that he likes me as more than a friend, but other days, I'm just not sure. We hook up with other girls and we even give each other advice about girls. But, at the same time, we flirt with each other. And its not just that joking-around flirting. We drunk kissed once at a cemetery and never spoke about it again. He constantly tells me he misses me and he almost comes off as clingy to me. However, he also tells me he's straight and several weeks after the drunk kiss, I asked him how he felt about the kiss and he replied that he didnt enjoy the kiss, but also that he didnt mind it. Sometimes I think he may be telling me he's straight simply because I tell him that Im straight. Weeks before the drunk kiss, while we were high, he told me to kiss him and, out of nervousness, I laughed it off and said nah. He generally acts straight, but then again, so do I. Lastly, Im not just physically attracted to him, im really emotionally attached to him too. It seems like he feels the same way but I just dont know. Whenever he sleeps over, we wrestle and tickle each other on my bed. Ive casually given him a kiss on the cheek and he smiles back at me. Like deadass, he even lets me feel and kiss his abbs. But as soon as I try to go any further, he'll literally stop me, turn around, and fall sleep. He confuses me. Anyway, I have no idea how telling him how I feel will impact our friendship. Apart from my gay feelings for him, Rob and I are actually really close friends and I dont know if im willing to sacrifice such a strong friendship for something that could, but may also not, be something more. Ive been meaning to tell him for about 3 months. He's going to california for a week and says he really wants to see me before he leaves tomorrow. It'll be just us two hanging out for a few hours. Should I tell him tomorrow or should I continue to just let things unfold?