i consider myself pretty fit i guess... i got muscle on my arms... im not fat... and i almost have abs

Im not really sure how tall i am cause like.... ok... My friend sais hes 5'7 and then we stand up and im taller than him...

or this other guy sais hes 5'11 and hes got like half an inch on me... or some other guy sais hes about 5'7ish and were like the same height
I use to be about 5'4 and 140.. before i started goin to the gym.. i lost a bit of weight and grew some... now i wanna put on some more muscle...
Dont really know what to do tho... I run about 3 miles... couple times a week.. and then i do some weightliftin i guess... and on days i go to the gym i get enough protein... not seen much results tho..