Hey crazylucyloo,
Hon, I know exactly how you feel!!! I'm working on the same thing with my therapist, but I feel your pain- it's so hard to change a thought-pattern that has been going on for practically my whole life!
I know that it's cliche, and I wish I could give you better advice than this- but you just have to keep on trying. The positive self-talk might seem fake right now, but hopefully if you keep it up long enough you'll start to believe it, and you'll feel better about yourself. I know it's frustrating beyond belief, but it's what I'm working on right now, too, and we just have to hope that it'll work out.
Also, my therapist always tells me to look at myself from the perspective of others... Try to rememember the good qualities that ur friends and family see in you, and when u get a compliment, do your best to take it to heart. I also agree with misstaken- writing in a journal might help- it definetely gives me a better perspective on my life.
U seem like a sincere person and I'm sure u have many positive qualities, so I hope that someday you will learn to love yourself!!! <3 <3 <3 Everyone deserves to be happy.
take care, and if u ever need anything, feel free to pm me!
~drama_queen~