How to get over FOBLO

K please only positive and encouraging words please! Please no rude comments! I don't want negativity!

Ladies I need some help to get over my fear of being left out! My relationship is struggling right now. My husband and I talked and he said that I have a big impact on the way his health is. He wants to go to the gym but he won't go cause it gives him anxiety knowing that I'm sitting home mad that he went without me. He won't go air softing cause he has anxiety thinking of going cause he will know I'm sitting home mad. Thinking about going anywhere gives him anxiety cause he knows that I'm mad that he went without me. I have a fear of being left out or doing things alone by myself. How do I get over this it's causing a problem in my marriage and I need help. I don't like doing things alone or being alone. I love doing things with my husband. But he says he can't go out and do things by himself or for his self cause he knows I'll get upset and be upset that I'm home alone. Please help!