Insecurities

Ive been sexually molested for 8 years of my life from age 5-13 yrs old im now turning 19 struggling with depression anxiety ptsd and anger issues. Ive been in a soon to be 2 year relationship and it just interferes a lot. I don't know how to change my insecurities i dont feel beautiful anymore ive lost a lot of weight im not happy with myself. I dont want to lose what i have left. Im also SUPER jealous worried about all the things my partner does. Im always assuming things that arent and in my mind im thinking she cheating she doesn't love me and that's because of my past. From past relationships and my abuse. How can i past that and move forward. Please help...