Most Helpful Guy
If you are really better than what he is then you would realise that playing his childish games will only ruin your self-esteem even further. You want to break up with him in a cold, damaging way? Do not stoop to his level of idiocy.
You cannot allow him to emotionally abuse you like this. You are only going to feel worse if you do but...
You have been allowing these guy to make you ride emotional rollarcosters long enough.
Just break up with him; text him, in person - whatever just do it as soon as possible.
Do not take him back no matter how much he begs you. He will just resort to the same way he has been treating you - like shit.
Let this be a lesson learnt. You are only 19 so take the time to recuperate yourself. Spend time with friends, focus on hobbies or schoolwork if you have any.
Most Helpful Girl
Sounds like he is playing with your emotions. The guy sounds bipolar or maybe suffering from depression. But I agree that the way that he treated you was cold and harsh. But you have to move on. You dont owe him anything. Its obvious he did not care about you like you think that he did, because he would of never treated you like that. I hope that you heal from this and move on. But the last thing that you want to do is go on a texting and calling spree.. begging him back. he needs to miss and really realize what he truly had.