Found Love?

I am 32 and have had very little positive relationship experience. I am now in a relationship with a man who treats me very well and that I care about. The problem is that I've spent my whole life worrying about what other people think, and even though he makes me happy, other's are judging him and I am feeling so much pressure and anxiety over it...not to mention that I'm dealing with my general tendency to sabotage my own relationships. I'm trying so hard to make it work, but I feel so unstable with my negative thoughts that things will go bad, and I can't control all of my fears. I have some supportive friends and family that are helping me work through things, and I'm also going to therapy, but I just can't stop my negative thought patterns. I need help!