What you are describing is consistent with social anxiety. People with social anxiety are overly worried that they might be judged negatively by other people. Lots of people have mild social anxiety and find it somewhat difficult to make friends or to be comfortable around other people. But it is serious when it interferes with a person’s life so much that they only trust a very few people and don’t want to go out at all. That seems to be the case with you.
The good news is that there is help for social anxiety. You can start by reading up on it. Search the web for information about what it is and how it is treated.
Here are a couple of good books you might want to look at:
“Overcoming Social Anxiety and Shyness: A Self-Help Guide Using Cognitive Behavioral Techniques” by Gillian Butler.
“Shyness and Social Anxiety Workbook: Proven, Step-by-Step Techniques for Overcoming your Fear” by Martin Antony
If your boyfriend wants to help you, he could support you while you do the activities that are recommended.
Another option is to look for a cognitive-behavioral therapist. CBT has been proven to be the most effective treatment for anxiety and depression. A therapist will provide you with practical coaching and emotional support.
Please do start working on the problem. It won’t get better by itself. You deserve to be more comfortable and to have some good friends.
I wish you well.