I don't ^can't remember from when I didn't make a plan for a New Year. However, I want to write even a small plan for this year. I haven't been doing something^s or going somewhere ^places alone,  ^. I always did^do something with my friends or colleagues. However, circumstances are changing. Most of my friends get married, and their life is moving on^to family. Therefore, I realized that i  ^I need to get used to do ^doing something^s alone ^, such as going ^{to a} gallery alone. Even thinking about it, I feel awkward. Therefore, one of my plan  ^plans for this year is doing  ^{to do} something by myself and enjoying doing it alone.

Corrected: 

I can't remember when I didn't make a plan for New Year. However, I want to write a small plan for this year. I haven't been doing things or going places alone. I always do something with my friends or colleagues. However, circumstances are changing. Most of my friends get married, and their life is moving on to family. Therefore, I realized that I need to get used to doing things alone, such as going to a gallery alone. Even thinking about it, I feel awkward. Therefore, one of my plans for this year is to do something by myself and enjoy doing it alone.