When I look in the mirror, I see a fat girl?

I'm 5'4''-5'5'' and about 150-155 lbs. I consciously know that I'm not fat, but I can't help but see an obese person in the mirror. It keeps me from wearing alot of things, like fitted short-sleeved t-shirts. I have genuinely been eating healthy lately. I just haven't been seeing any results. It makes me soo depressed. I feel so obese, especially compared to my friends! They're all like 110-130...blehhh:(((((