Husband of 15 years sexting women and men

This is my 2nd marriage married a childhood sweetheart. My dtr was living with us and noticed my husband texting all the time, while I was at work. She told me so I found this phone and the texts were deleted. Pulled phone records and confronted him. The 1st one was a women he met while we were both at a bar watching a friends band. He sat down and a women starting talking to him. She gave her number to him so he texted her a few days later. Sex was the topic and meeting. He said he never met her only texted. This was 5 years ago. It stopped when I found out last year. But 3 years ago he was curious about men and had 6 or more on going contacts. Texting pictures of private parts back and forth. He said he never met up with them because he didn't want to catch anything and how would he explain it. Then the topper is a young woman 30's husband late 50's. Two years ago a friend of the family girlfriend starter texting my husband about their favorite team. Then she sent him naked pictures and he sent them back. When I confronted him he said nothing happen. It took him amonth and a half to tell me the above. So to me he was doing this behind my back or in front of me. He said he loves me. I said how can you be in love with me when you are doing this. Everyday I asked him to tell me the truth and again it took him a month and a half. He was my world so I thought. He said he won't do it anymore which he hasn't as far as I know but the hurt is so deep that he did this and kept secrets. I get so depressed not sure if I want to stay with him. Help,