I've been in Thailand for years with so-so Thai language ability and Just recently had one Thai guy that I would consider a friend in any real capacity. Compared to my 2nd week living in Vietnam I made multiple "real" friends with local Vietnamese guys even with little in common interests, hobbies, time spent in the country or language ability with my non existent Vietnamese and their somewhat poor English ability. They've gone out their way to help me out with favors with and without asking, take a genuine interest in me, who I can hang out like friends back home just chilling over a beer or two everyday/night. They have refused to take money or expect anything in return the majority of time even when they done something valuable for me and rightly deserve something for it. Anything I manage them to take they're very grateful and appreciate of and not ask for more or expect the next time. This includes other nationalities like Russian, Mexican, Nigerian, Colombian, etc I've easily became good friends in a short period with during my travels and they would all be welcomed into my home and me into theres like family.
Thai guys, who I absolutely no problem with and get along quite well with the vast majority I've come in contact with from all social standings (although mostly from lower to mid), the rudest thing or biggest conflict is sometimes being ignored or seeing them disinterested with interacting but majority of the time its big smiles and pleasantries. I havent really been able to make a connection with or would be able to rely on them for something thats not some kind of transaction or reciprocal altruism. Unless we have a common interest or activity like fitness, muay thai, motorcycles, we just dont seem to really click although I think the language barrier is still the biggest obstacle. Theres other factors at play, I think thats just how it is. Nothing against them personally no animosity. I do like and admire their personality and disposition of Thai males. And of Thai people in general, some of my favorite people in the world, the ladies in particular of course.