the guy with confidense can back it up. the guy without will be evasive, vague, etc. when confronted.
If you want to befriend someone like that, that's one thing; but if I were you, I'd think twice about dating someone like that. He is probably insecure and that's why he tries to prove to the world that he's top dog.
You can sit in a room with an olympic gold medalists that self-aware, resonsible and with self-esteem...and if YOU didn't know they won it - they'll never mention it. And if someone else brings it up that joins you both, they'll admit readily "yes, I did that." That's "not egotism but a healthy self-esteem".
Got to love him!
Excessive talk—incessant attempts to dominate conversation, or steer the conversation to oneself.
Exaggerated behavior—always attempting to force oneself into the center of activity.
Insensitivity—expressing views or taking actions without regard to the thoughts or feelings of others.