In most cases the title of this article (I Kissed a Guy and I Think I Liked It, in case you weren't paying attention) applies to younger men. If you're in your forties or fifties chances are pretty good you've established your sexuality and are comfortable with it (not always of course and if you're an older men still exploring then we welcome you). Younger men are the ones that tend to struggle and there's nothing wrong with that. In fact, you've joined a significant group of guys that aren't quite sure where they fall, sexually speaking.
For a surprisingly significant percentage of men there are genuine questions regarding sex and sexuality. Perhaps you've had homosexual dreams where you have blistering gay sex with another man. Perhaps you spend time on a gay site looking at profiles and thinking about what it would be like to be with a man. Perhaps you secretly belong to a gay social network and indulge in fantasies that way. Perhaps, as the title of the article suggests, you actually kissed a guy for the first time and liked it. All of that is perfectly okay and you have no reason to panic, worry, or work yourself into a lather over it.
There's still a fairly large part of society that is unwelcoming and sometimes harsh towards homosexuality (witness Republican presidential candidates demonizing homosexuals every four years) so it's no surprise that you'd be a little scared about these feelings you've developed. I understand any reticence you might have towards exploring your desire for men but it's awfully sad to live a life where you deny a basic part of you so it's of the utmost importance that you give these feelings a chance to breathe. Explore your desires. Find a gay site and chat with someone for real. Join a gay social network as yourself and see if a little exploration yields greater feelings or if you find yourself turned off. It might be that you're not gay, just a little confused (you wouldn't be the first guy to fall into that category).
If you haven't kissed a guy and have no idea if you'd like it then why don't you give it a shot? It wouldn't be the most difficult thing to find a man willing to press his lips against yours and perhaps slip a little tongue in there. A dating site would certainly help you with that. You could join a GLBT friendly group and explore with like-minded and welcoming people that would be more than happy to help you through your confusion. You could just go on a few dates with guys. Even if it doesn't turn into anything physical you can get to know someone new and enrich your life that way. There are lots of good options for you and it's worth looking into all of them if you're gay curious and you want to explore a little. Don't be afraid to try something new.