Feeling like your not good enough for him

Ok lady's so my hb and I have been together for 6 years and have 3 children. The other night I was going through his text messages when I found that he was telling another woman she is sexy and hot and that he was having sex dreams about her. He said he didn't mean to heart me and stopped talking to her. But how do I make him look at me like that again. Been trying new things in the bedroom and it seems to help