hi rio, yes everyone dissociates to one degree or another. examples, getting lost in a book or movie, daydreaming etc. the difference is in the degree and whether it's affecting your functioning in life. there's a whole spectrum. getting lost in your own thoughts, or drifting off into yourself is pretty common but only you and/or a trained counselor could really be able to tell you if it's a condition that needs treatment (there's really no meds for dissoc itself...talk therapy is how we try and work out the parts of ourselves that we've closeted away) with the goal of integration of thoughts, feelings, experiences, mental and physical processes in the psyche.

if you are uncomfortable with the symptoms you describe and it's bothering you, then i would suggest seeking help. otherwise, it's probably just part of your personality.