Why not write down all the positive things about yourself.
When we think negative thoughts naturally life sucks, when we think positive naturally life looks up.
Same as whom we associate with. If we hang around negative people they will bring us down, if we hang around positive people, they will bring us up, in belief.
For instance:-
Your an artist - and good at it.
Your an animal lover - and would save an animal if that arose.
Your loyal - you make a good friend.
Your honest - that's a quality people love
You have long, gorgeous hair - shows you care about yourself
Your thin and petite, have a nice figure - shows you look after yourself
You have a sense of humor - you can make people laugh
Don't come back and say but, but, instead add to this list
Keep going