As people have stated previously on your posts, apply for the correct visa to remain here, you have been here for a long time, immigration know you are not a tourist, it’s really quite simple.
You will need the person whose name is on the blue Tabian Baan( house book) and their ID card as well, it can’t be your girlfriend if she doesn’t own the property.
we were last there only 4 months ago to visit our friends, it was everywhere, the smell coming out of the bars etc, even seen a fair few people smoking their joints walking along the beach it was everywhere.
if you love the smell of cannabis everywhere it might be ok. I personally think it’s one of the worst islands in Thailand, and we have friends who live there, who now think the same and are trying to sell up.