WHAT IS THE PERFECT WEIGHt?

i am 5'8 and 135 pounds. sum ppl say imskinny but i like my body because its built i have the six pack and stuff but my friends say it is still real skinny specially when u see me from me side casue my waistlien seems too skinny. i am happy with my self am not concerned too much with wat otehrs say too much. i tell ppl i am perfect my weight is model material is that every1 else is fat. thats all i can really say because realistically i am skinny but sum girls luv t cause they say i have the model appearance........broad shoulders built back sixpack and a nice backside all at 135 but soem ppl say i shud move to 145should i i mean i dont really care weahter its 135 or 145 juss roughly do u think i shud? i can move weight calsses very easiyl so shud i or the appearance i have is fine 10 pounds more juss amke me look bulky? thanks