aww darlin, i so hear ya!! i think its because one gets so comfortable once you have a bf it seems like you got what you were 'working' for and there is nothing that you have to change about yourself anymore because you have what you wanted..
you should do it for yourself... just a week ago i was so depressed cause i couldnt get any motivation!
now, i did that, i wrote down all the reasons why i should loose weight NOW and not tomorrow or somewhen, here is my list i copy and paste, so dont be offended when its somethin a little hard or strange lol
i hope i can help you a bit
good luck
My motivation list:
Why do I wanna loose weight?
-to feel pretty, and sexy again
-to get rid of that competetive thinking all the time when i see pretty girls
-to stop unneccessary jealousy because it damages my relationship
-to be healthy
-to gain back confidence
-to buy the clothes that I want to, not the ones that I have to, so it covers up this and that, or it just looks stupid with rolls and fat
-to love myself more, so i am more satisfied in life and dont stress so much
-so i can enjoy life without always having the thought im not worth as much, because i weigh more
-because i know that if i dont start loosing weight now, i will be hating myself in half a year when i even got fatter, cause then its sommertime and i wanna have a fine body in a swimsuit
love