I really wouldn't call that compulsive lying. That's too dark a term, IMO, for what you are describing. It sounds to me more like fantasizing that you share with others to feel more acceptable. But it's sad. To do it now and then woukd not be wrong. You're under no obligation to give everyone and anyone a window into your life. A little fiction now and then can even be a healthy defense mechanism. I had to learn that because I was the opposite and tended to be unwisely open with people, which I don't recommend. It's better to have the mental flexibility and resourcefulness to spin a little story when you need to protect yourself. But you are taking it too far, I think.

It sounds like you don't trust anyone. Or you don't trust anyone to like you for yourself. You're carrying around too much shame. People aren't all that bad. Some are. But don't assume that everyone is. This habit will keep you that much longer in a friendless state. Give yourself permission to bare your soul just a little once in a while. Someone says they had a great weekend. If they are someone who has been okay toward you, try saying, "Well, darn it, my weekend was an absolute bust. Think I'll have to come up with a better plan for next weekend." Maybe this person will offer you an invitation. You're giving people the impression that you don't need anyone. It's okay to be in need of someone reaching out to you.

When I changed schools at age 15, I would spend the lunch period in the girls bathroom. I was afraid to go into the cafeteria and be seen eating alone. Then, one day, I was so hungry that I decided I just wouldn't care. So I started going in and getting lunch and sitting down by myself. I thought I looked like the biggest freak in the school. After a few days of this, a wonderful classmate of mine came over and insisted I sit with her and her friends. We became close friends. She ended up letting me know that she admired me and felt complemented that I liked her so much. She was a cheer leader and very popular, but she valued me more than I expected anyone at school ever could. She had her own insecurities and shared a lot with me. Give people a chance. You might get real surprised. They all have fears and inadequacies too.