Insecurities

Okay so I'm 5'3 maybe 5'4 and 100 pounds and I'm beyond insecure about my body and what people think how can I not be insecure cause I honestly hate being insecure I want to be able to eat what ever I want and not think I look/feel instantly 10 pounds heavier and When people give me compelments I just think they are saying it and not meaning it even when they really do mean it. My boyfriend reminds me everyday that I'm nothing but perfect and he really wants to see me love my self as much as he loves me. Anyone have advice thank you!!