I can connect to what you are saying. I am an introvert and prefer my own company. One of the things about recovering from gambling is that it made me realise I couldn’t do it alone. I discovered co-counselling and from there GA (Gamblers’ Anonymous) and then counselling.
You say you know you should keep trying with therapists … so do so! Often a therapist will give a cheap rate or even a free session for the first time to see if you are a good fit. Take advantage of this and see as many as is needed to find the right one. Someone you can trust and feel you can say anything to is far better than thinking about this or that sort of technique or approach.
I too have a batchelor’s degree – and eventually came to the conclusion that I need challenges in life and that “doing what I have always done” will not allow me to grow as a person. I challenged myself to come out of my comfort zone, but stuck with things that I thought I would enjoy. I like music so went to concerts more often but found I wasn’t connecting to people there – so I tried dancing. I was useless at first, but gradually bit by bit I got better and grew in confidence and now have another “skill” which is appreciated by the opposite sex. I joined a bookclub and a quiz team and made a few friends at both … connecting with just a few people at a time is easier for me than big crowds.
So my advice, for what it’s worth, is to find something that will move you forward as a person, something that comes from you – that you have always wanted to do, but have been putting off or feel scared about. Take the plunge! If you have a batchelor’s degree is there somewhere to go to improve on this – either specialising or going for a Master’s in the same area? Life is for living … I think we forget this when we are using up our lives chasing our losses. Go well.