[Help] Is this gay? I need help

I arranged to watch superbowl with two of my buddies, Mike and Will. We were just relaxing and drinking buds at Will's apartment. Will is gay but not like Perez Hilton gay, he likes football and drives a lifted F-150. When he first told me he was gay I didn't believe him and up until the other night I kinda thought he low key liked the puss but was just confused about it.All was good until Mike got a call saying he needs to go to work as the burglar alarm had gone off and he needs to go check the building. Mike's work is a long distance from the apartment so he let us know he wouldn't be coming back.Anyway Mike left and I was alone with Will. I drank a few cans of beer and we had ran out of Bud light so Will offered me JD and Coke which I accepted. Will is not much of a sports guy, I think he just enjoys our company.So I was talking with Will and eventually we got onto the topic of women. I was pretty inebriated at this point and I can't remember so much how the conversation got to this point. I remember becoming physically aroused somewhere in the conversation describing sex and maybe he noticed as I was trying to hide it.What I remember though is this. Will was trying to tell me that men give better head than women and that ass feels better than pussy. He poured me another drink and after I had drunk it he said along the lines of "David, if you don't believe me why don't you let me show you". He then reached over and put his hand on my crotch.I don't know what was going through my head, truly I do not, but I let him suck my dick. And inspite of being very drunk, I remember it was probably the most pleasure I've ever had sexually in my entire life. I was so turned on at this point and to cut a long story short I ended up penetrating him and cumming in his ass.As soon as I got done he just said "I told you it was better than pussy". At this point I realised I had made the biggest mistake of my entire life. I have regretted it ever since but I can't get his stupid face out of my head.I need real help. This doesn't make me gay, right? Will keeps calling and texting me but I'm not answering. This was the worst decision I have ever made. Did Will rape me? I feel like he may have slipped mind altering drugs into my drink. I was definately coerced into it and I feel used. I did not touch his penis at any point. Am I gay now? How can I be straight again? Please help me.