I have copied and pasted the following from the cycle of abuse web site.
Effects from abuse.
Isolation from others, withdrawal from family and friends, avoid the public
Spending more and more time at work, not wanting to come home
Low self-esteem, feelings of worthlessness
Depression, thoughts of suicide
Emotional problems, shame, emotional highs and lows, emotional numbness
Illness - physically, mentally, emotionally, spiritually
Increased alcohol or drug use, addictions
Withdrawal from real life into an alternative reality - perhaps the Internet
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You are caught in a cycle of abuse,unless you break that cycle,nothing will change,he won't change and you will get worse.
You need help in real time,its hard to find the courage on your own,that's why you need someone on your side to help and support you.
Can you talk to a friend,mother,aunt,father,brother,pastor?
Your boyfriend needs help,and you can't help him,he needs anger management and perhaps councilling,but he needs you so he can feel powerful,you leave,you take the power away from him,and you then have the power over your own life.
Sadly I'm speaking from my own experience,and I wish I cound'nt,but the best advice I can give you is,ask for help,it's the only way out. http://www.heart-2-heart.ca/women/page5.htm