Thanks for the offer, but you are only rated 150, I'm 1100 elo 
. I objectively don't think you could teach me much apart from how the pieces move. We can play a game if you want though.
Every time I start a game, I am scared of losing it - and yet usually I end up winning the game. A perfect example would be my last few games, which I won.
I think it's because of the rating aspect, but then when I play unrated it's another thing. I think about the fact I would have earned points if I was playing in rated, and when I lose I get the feeling I'm not improving.
Edit : I am improving, and that's the worst part of it ; I play rapid mostly and don't care about my blitz and bullet rating, and over the last three days I have gained 60 elo.
Can anybody give me advice on what to do ?
Actually you don't "usually end up winning the game." If you add up all your wins, losses, and draws across all time controls that you have played you have lost or drawn more games than you have won.
Well first, that is wrong. I have won more games that I have lost. And second, it doesn't change much to what I said, sometimes I am very nervous about starting a game, and win it. Purely said for demonstrating purposes. Your comment was neither relevant nor helpful anyways .
Personally in the beginning of me playing chess i would get very afraid that i will lose but now i dont.....because i learned that when i will lose i will learn something