Hello waves,
I haven't posted on your threads before so you won't know my name, but I've read them and often sent positive thoughts for you.
I want to tell you something really important. I think it might be the key to finding your way out of this.
You mention not being good enough for him. I believe that you feel not good enough, but that you have become confused about who you are not good enough for. It isn't him who needs to love you, it's you. Somewhere inside you there is a little girl who feels unloved, scared and not good enough.
What you need to do is talk to that girl and let her know that she is ok. That she is loved, and worthy of love, and good enough. When you start to feel sad, or when it gets worse and you feel the need to fall into his arms to make you feel loved, try instead to do this:
Close your eyes and think back to yourself at a time when you felt sad and alone as a child. Picture yourself and lock that picture into your minds eye, so that you can feel yourself back at that moment. Then imagine yourself as a girl sitting opposite you now. Go to the little girl that you were and hug her, tell her she's lovely, say and do all the things you do when your children need your love and care. That is what you actually need. You need to give yourself the help and support that no one else can.
This technique will help. It may feel weird and stupid at first, but it's a very powerful thing to learn to do. No one else in the world will ever be as strong a support and help to you as you yourself can be. And when you learn to love and care for yourself you won't feel that desperate need to be good enough for someone else.
Keep doing this every time you feel weak and sad. It will help.
I wish you all the best.