Cheating Or Not?

Hi i am 38 yrs old and have been married going on 15yrs. I have 3 children ages 19,6,2. The man i married is 18 yrs older than i am and very set in his way's. When we first got married i had already had my 1st son from a previouse relationship. Anyhow let me cut to the chase... I am bisexual and use to share my experiances with my husband until things changed and i only wanted him. As time went on and things changed in our lives and we seperated for about 2yrs but continued a sexual based relationship/marriage he dated others and had a lil girl whom i have been raising since she was 17 months. Her birth mother is not in her life nor does she know of her. But my husband has remained in contact with her and has amitted to having a sexual relationship off and on since 2007 umongst others. Recently i have snooped into his cell phone text messages and have read text from other women some of whom i know and they are asking him for more sexual incounters.. I have questioned him and he says i should not worry that he comes home to me and that noone is replaseing me and that he doesnt have feelings for them that he has sexual desires. I say ok fine lets do it together and he just gives me the cold shoulder. Our last and only child was born on 2009 since then i have gained alot of wait sometimes i feel as if he is no longer atracted to me and he has no longer been afectionate kissing,hugging,holding hands. I just fill like i am here to take care of the children and keep up the housework... We own a home and business together. I am sad but try not to show it :/