Is it normal to feel nothing but also not feel depressed?

I think some neurotransmitters in my brain are fucked or something because I never feel much of anything (physically or emotionally). I don't mean that in an edgy way either -- I'm just not half as emotional/lucid as I would like to be. Whenever I'm buzzed or drunk I'm elated because I can actually "connect" with the world.

Despite not feeling much, I don't think I'm depressed. I've never felt any kind of dread because of this problem. I'm content with my life, just disappointed that I can't be on the same level with my girlfriend who adores me. And yes, I do love her, I just don't like that I have to "think" that and I can't just feel it normally. It's like this with everything in my life, so I don't think a lifestyle change is going to do me any good. I just don't think I ever actually experience joy.

For example: I have low sex drive, I can barely connect with people I care about, I hate conversation, and I feel nothing when I orgasm. But I'm generally satisfied with life. It doesn't seem right.

Edit: I do not use medicine of any kind, and I only drink once or twice a month.