I'm 15 but haven't hit puberty yet

Guys I'm 15 and I'm going to be 16 in more 1 month every one are taller than me and everyone in my class had hit puberty but I haven't

No one is teasing me but some guys just don't talk to me,many students say that I look like 8th grade boy I'm very depressed about it

I'm only 158 cm tall and 43 kg in the age of 15

I do not when will my height grow and when I will get beards or moustache

I'm having hair in my genital area but not at all in my face my face is just clean with no hair 

I'm afraid that I would not grow or I think my growth has stopped I atleast want a height of 176cm when my growth has stopped

Can u guys cheer me up???or at least say what to do to improve my height 

Pls don't say about healthy foods I have heard many times about that Just say about some exercises

Thank you