Find a girl that s the only solution, the girl can be your life partner or just a partner to have sex alone for money or anything in favour to her.Don't worry it will eventually change once you find a girl and sex with her in real.
I agree with this. Find a partner so you wont need to do it yourself.
Stop thinking sexual act as well to refrain the eagerness to masturbate.
Help yourself and try to divert your mind and make yourself busy in different activities.