You are too old to be yelling, crying and saying things you don't mean because of temper tantrums.

Your behaviour has caused you a breakup. This is a good time to take a step back and focus on your own personal goals and maturation process. It's likely that you have been so focused on school that you haven't had a chance to think of your emotional development.

Read up on communicating with partners, on how to properly argue in a loving partnership, and about emotional abuse in relationships. Be sure you are on sound footing before you attempt to get into your next relationship.

Yelling, crying and name calling or outbursts are not acceptable in adult relationships. Your BF was right to break up with you. Fortunately, you can learn ways to stop this behaviour.