I Have Been On Ativan For Quite Some Time And

I have been on Ativan for quite some time and only take as needed, but lately I take 1-2 times a day. It is the lowest dosage .5. Is it habit forming? Can I increase the dose if .5 isn't enough. I am 67 years old.
A rip off-- I thought it was free. I can ask my pup his for free. I mean pcp or DSM for free