@Emily ***********
and
@Ja***
spotted and asked are you a legal resident of Myanmar? <- meaning do you work there legally with the correct visa and work permits? Just being a brit who happens to live in Burma isn't gonna be enough for you to get a 6 month METV <- multi-entry tourist visa.
You could however get a single entry tourist visa. Understand the way that works is the visa is VALID for 3 months <- meaning you have 3 months to enter thailand when you'll get stamped in for 60 days like everyone on a tourist visa does, AND you could get a 30 day extension on that at the immigration office.