I think alcohol made me gay

Hey guys,

I´m losing my mind here. It´s already the fifth time that it has happened. I´m a pretty heavy drinker, which means three to five times a week heavily, especially at the weekend. I also drink mostly with my friend group. The first time it happened was three months ago. I was almost blackout drunk, and started making out with a good friend of mine. The first time we dismissed it, but over the course of three months, it happened around five to six times. And it´s getting worse, it has already put a strain on our friendship the other friends are making fun of us. I am certain that I´m not gay, but it happens so often.
I don´t know if it´s the alcohol but it happens so often. When I´m sober, I never feel like this. Is it something different? Has anybody experienced this? Please help