Dude, you need to learn how to gain some muscle the natural way! You need to get a minimum 1.5gm protein/lb BW and at least 20-25 calories/lb daily! Once you get that sorted out you should be able to add significant mass drug-free (as long as you train properly and get enough sleep/rest)
Forget about Humatrope!!!(sell that shit and buy food and protein powders lol!. Actually I'll buy it from you!) After you add atleast 20lbs solid muscle, then you may consider a low dose AAS cycle to start. Maybe after your 4th or 5th successful cycle, then you can consider some HGH!