Addictions to porn can happen, but it would be hard to say after only two weeks that this is what you have. If you're gay or "fire up" emotionally to gay imagery and you have never seen it before, it's not surprising you would want to watch it a lot at first.
I would suggest that you keep the idea of being gay on your plate of possibilities, and try to relax. Who you connect with emotionally, and who you love, is a better indicator of being gay or straight [or somewhere in between], than what happens when you watch porn. Porn is designed to go straight to (and create) a sexual response. Even some people who know for sure they are straight get surprised by responding to gay porn (I've especially seen women write in to the site about this). I always thought having a reaction to gay porn if one is actually straight might be because the person can relate to what the person (of the same gender as them) in the image feels, rather than it always being as simple as, the porn has revealed something about one's own sexuality. Keep in mind that in porn when men have sex with women, it's done more to be photogenic than to be realistic, with a lot of pounding and macho posing, and it's kind of a crummy role model and can make heterosexual sex look pretty unappealing. At the least, if you're straight, remember that it isn't not necessary to be like that to be a man in real life having sex.
Anyway, good luck. You might be gay, you might be straight. The new liking for gay porn might have revealed your sexuality to you or maybe you just don't like heterosexual porn, with its roughness and crudeness. In some parts of the world being gay is a lot more difficult than others, but if you come to the conclusion that you are gay, learn what you need to do to be a safe and happy gay person. There are some good websites for teenagers (for example) trying to figure out if they are gay or straight (not porn-based obviously, look for educational websites). Look some of those up and go from there in deciding where you come down on the gay/straight continuum.
Good luck!