This is an often asked question. There are resources which can help you and your spouse determine if he/she is struggling with sexual addiction. There is an online assessment for you as a partner which is the Partner Sexuality Survey which can help you determine if your partner is struggling with sexual addiction. There is also an online free assessment (the Sexual Addiction Screening Test) which your partner can take, if he/she is willing, which will help determine if there is an addiction to sex.
Licensed Marital and Family Therapist