Is there such a thing as to much masturbation? Seriously...

Yes. If you spend so much time doing it that it interferes with work, studies or social interaction. Otherwise not really.
Not really. Only if you find that it is interfering with work, social relationships, sleep, or day to day life.
Yes. Although masturbation in moderation is not harmful, if it is done to the exclusion of normal daily activities it can become a problem. Furthermore, if you have a sexual partner excessive masturbation can make it harder for your partner to cause you to have an orgasm which may cause distress for your partner.