Nope. It is not you.
You seem to be more inclined towards creating LTR as opposed to 'playing field'. It is just who you are and there are many men, regardless of age and looks, who have similar inclinations.
Other guys are more into 'playing the field'. It is just who they are. Neither of the two is 'right' or 'wrong' in any way.
I tend to believe that it is only very human to desire something that is more difficult to achieve as opposed to desiring something that is within your reach.
At your age, for most men, it is simple and easy to 'play the field'. Relationships among other things require maturity, which sometimes, certainly not always, comes with age.
You ought to do what you feel is right for you.