Enough is enough!

I am just tired of feeling lousy about the way I look. I keep repeating.....if you change nothing, nothing will change. So I am changing my eating habits. I am going to eat clean. No processed foods and no drinking! No desserts either. I have very good will power! I am going to Italy and Croatia in May and want to lose 20 lbs by then! I am going to do it! Any tips are really welcomed. Hoping to find some friends to lose with