How to deal with anxiety when dating for the first time in years. always been alone

Hi Everybody I have been treated for anxiety and depression for years.I also see a therapist. I was laid off from work about five months ago.Hopefully a resent job interview comes through.When I was working my pattern was eat,sleep,work on and on.Since I have been off I have done some home projects.I have been single for many years.But this free time has helped me realize that I need more positive people in my life.I met a new friend recently which I put off for years Now I have met a possible person to date we went out to eat, A concert,And to the park. I felt really good which is a feeling I do not get often. Now we are getting togeather to go to the movies. Yesterday the day IN between I started to get anxiety. I had not had these feelings in years. And the feelings in the past were not as strong because I was always working.My anxiety in the past has kept me from meeting new people.How should I deal with the anxiety and negative voices.Such as your not good enough,It will never last,you should be working 60hrs  per week you have work to do at home. It would be easy to cancel the date and stay single. I have done this in the past. But I do not want to do that anymore. I also have to deal with my negative mother who I love but says toxic things to me. Such as when I told her I was going out with a new friend she thought I was lying made comments like sure you are. I feel that she wants to keep me single because she trusts no one. And  is insecure thinking I need to spend all my free time with her.How would you suggest I deal with my anxiety and not cancel dates unless there is a emergency. How do I deal with toxic comments that come from my mother . Those comments can ruin my day they hurt. Any suggestions would really help. Thankyou for all your help.