I just turned 18, can i get taller?

some folks grow up to age 20

possible, but unlikely.

If you are female, it's not very likely, if male, possible but not super likely.

your a short butt arent you , spend the rest of your life thinking why you are so short .

well if u gay than no

Most men continue to grow until they’re 26, so I wouldn’t worry about it. My dad went into the army at 6’1” and 18 years old . He got out at 22 and he was 6‘4“ tall

Yo i just turned 18 on april 12 as well

Only if the growth plates in your bones are still open.  The only way to know is to get an x-ray. 

For most people, growth plates fuse within a year of the end of puberty but there are definitely males who grow in their late teens and early 20's. Once the growth plates fuse/harden, the bones can't grow longer and you can't grow taller. Until that happens, an increase in height is possible.  

That depends greatly on what sex you are. 

HGH and other methods only work until your growth plates close.

And for males that happens at 14-16