If you feel this way or even ask yourself this question, you probably are in a mentally abusive relationship. Only you can decide what to do, but respect yourself.
If this is how you feel, then the answer may be yes. IF you really can't figure it out then talk to a friend or family member who you trust. Maybe they can give you a good perspective.
Only you can determine if you are in an abusive relationship. If he is making you feel bad about yourself, than the answer if probably yes. Communicate this with him, and if it continues, get out!