Whether we realize it or not, growing up we get conditioned to look for friends in people that pass certain parameters. That is, when we look for friends at all. On adventures, you come across people from all walks of life, no matter age, gender, religion, country, etc., going through same experiences as you, and in them, you can find friendships that can last lives.
While most Thai locals are friendly and will offer help during your stay, you must be wary of those who would take advantage of you. Be cautious of suggestions given by cab drivers or friendly strangers and trust your instincts.