stuck in a size 0

I've been hearing a lot that I'm too skinny and that I need to eat more and that I'm in a verge of being anorexic..

but you see.. I still eat.. sometimes a lot.. I eat fried food as well.. I eat nasi goreng lumpia risoles (all fried indonesian food). but people don't stop saying how I'm getting skinnier everytime they see me or how I'm possibly anorexic

OK so I'm totally not anorexic.. I dont think I'm fat .. I just think I look normal. I look normal size when I see myself in the mirror. But I can't help wondering if I'm normal, why do I keep on having to try a small or Extra Small size for my clothes? Surely I can't be an XS for my 5'4 height (165cm).

I'm currently trying to evaluate if I'm having psychological eating disorder. The fact that I'm doing this analysis tells that I'm sane enough to be able to think.. and to think that I'm indeed not anorexic.. I can't help noticing though how I do limit my food intake if I eat at home.. my rice portion is a ball size with 7cm diameters.. I don't starve myself... consciously.. I wonder if subconsciously I do

My trainer told me to gain 2 more kg of muscle weight. Told me to eat more protein (read:meat). Now while I'm thinking of cutting down my intake on meat ( i pity the animals) and not quite liking the textures of meat.. OK so I still eat meat no worry...

I compared pictures of myself one year ago and now and I'm losing weight.. could have been the 4 hrs a week gymn that I've been doing..

nah.. wat do I know.. I think I'm fine