Most of the time, my boyfriend forces me to have sex. What should I do to change his mind?

 First of all it is not okay for someone to force another person to have sex. It sounds like you are not in a healthy relationship with your boyfriend. It is his obligation to acknowledge and respect your choice to not have sex.  If he is forcing you to have sex then it clearly means that he does not respect your choices as an individual. I would suggest to you that you should walk away from this relationship. You deserve to put yourself in a relationship that enriches your life, adds to your feelings of self-worth, enjoyment and growth. Have you tried to talk to him about not wanting to have sex? It might be a good time for you to evaluate your relationship and look at it critically. Here are some pointers that define a healthy relationship

• Treat each other with respect
• Are not violent with each other
• Can resolve conflicts satisfactorily
• Enjoy the time you spend together
• Can trust each other
• Are each sexual by choice
• Communicate clearly and openly

• Try to control or manipulate the other
• Do not make time for each other
• Criticize the other's friends
• Are afraid of the other's temper
• Discourage the other from being close with anyone else
• Push, grab, hit, punch, or throw objects
• Use physical force or threats to prevent the other from leaving