dude, no matter how small your frame is, you can get to 200 lbs naturally. You are a f-in giant man!!!! 6'4? dayum, you should be in the circus or something. lmao just playin bro. But you are really tall, I hit 205 at 5'11 taking nothing but food and a protein shake literally a couple times a month if I was lucky. 200 lbs at 6'4'' is still pretty damn small in my opinion. Now if you dont WANT to be 200, thats one thing, but your body is capable of holding that much weight FOR SURE, NATURALLY.
I think herbal "test boosters" would be ok for you to run. You really dont want to be messing with your hormones at this age tho, mainly because your natural test levels are already really high, and at 20 years old, your body is still maturing and going through hormonal changes as it is, so its a really bad time to be messing with that shit.
I had a friend who ran a "Prohormone" when he 19-20 years old. He didnt know what he was doing, and eventually had to have surgery to remove THE BREAST TISSUE(gyno) that grew as a result of his use.
I know you wanna be big and look good for your girl. But im sure she doesnt want you to have a nice little set of titties as well. It looks nasty bro. You dont want that shit. And its very possible.
There is no reason for you to mess with any form of AAS til you have been working out for a couple years at least bro. Youve only been hitting the weights for a few months. Give it some time, I think you could hit around 200 in the next couple months, IF YOU EAT EAT EAT.
and forget about Dbol bro. Its not for you at this time, and NO, its not a better option. Food, food and more food.
Stick around here and do your won research for the next couple years. And IFFFFFFF your still working out at that time, you MAY be ready to join the dark side, and we can talk about your use at that time. Until than, keep training hard and eating.
Stop by the nutrition and weightlifting sections. Lots of good info there