If you have apprehensions about intimacy, it is extremely important that you address this problem. Talk with your partner about your fears. Relationships are built on honesty. You have to be honest about your fears and insecurities. Do not allow your partner to attribute your behavior to something he or she has done, or something that is wrong with him or her.
Imagination can run wild when honest communication is absent.
Should you choose not to be honest, you risk damaging or possibly losing your relationship. Dealing with sexual problems starts with you. You need to be honest with yourself, then with your partner, and then, in some cases, with a therapist or other professional. You and your partner are not equipped to deal with issues like sexual abuse or rape by yourselves. Many things, however, can be dealt with by communicating honestly and thoroughly with your partner.