Husband doesn’t love me anymore....

My husband and I just celebrated our first year anniversary June 7th. For the past 5 months or more though he as just seemed so unhappy. He told me the other day that he just hated me and didn’t want to be around me anymore. I love this man with my whole heart and entire being! What can I do to help? He said that I’m boring in bed! He’s the only guy I’ve ever been with and I saved myself for marriage so I’m not that experienced. I want him to enjoy it though. I just don’t know what I’m doing wrong. Any help would be great. I’ve already found out he’s been talking to other girls. I don’t know what I’ve done wrong or where I went wrong. Again, any advice would be great! Thanks so much!!