Why am I socially anxious again after coming back to my home country and my hometown?

[Anonymous]

I used to be socially anxious in high school and university and I missed some opportunities because of that. I was quite confident in smaller circles and with my ex-girlfriend and I made solid friendships with like-minded people. Everything turned out to be really good and decent, but I think I could've done more. After uni, I worked abroad for three years and I felt like I was a different person there. I didn't have many friends because I became quite outspoken. I was more respected and admired by random people, but I still felt lonely and longing for home. I was much more confident with women. I approached women, I made out them at parties, I pursued them even when they didn't seem interested etc. I flirted on a first date with a woman like I was a romantic film character and then she was my girlfriend for a year. I had the b***s to ask the most beautiful woman I've ever seen in my life out and I was sure it would have worked were she not in a long-term relationship. Then I flirted like an animal with another good-looking woman and we had a fling after she unfortunately left her partner for me. She was so shocked when I told her that I used to be socially anxious. I eventually decided to go back home because I felt so lonely there. Now I've been back for a few months and I'm as socially anxious as I used to be, blushing and sweating around both men and women (especially women) and nervous even after a few drinks. It's good to have my family and friends back. I keep trying to overcome my social anxiety, but after social interactions I go back home drained, frustrated and I punish myself for being as I used to be.