The first type of "good" is much easier to spot. Those small clues at the beginning will become large glaring sirens later on. Raised his/her voice to their mother in anger over something small? -going to be a d-bag. When you want to be active they always opt to do something more "chill". -You will end up thinking they're lazy. Listen intently to those little signs. But the reason I ask if you are a good person is because we all think we are good people. Even the great villains of history all thought they were good. If all you get out of relationships are "assholes," then maybe pause and take a look at yourself. What is it about you that is attracting these people? What situations are you in that these types of people abound? But how do you know when to trust someone? That's a case by case basis and there isn't a good broad answer. You just know.How do you know when someone is genuinely a good person?
Are you? How do you define "good?" There are people that will intentionally hurt you and then there are people that are feckless and through passivity or a lack of social know-how hurt others. So "good" can mean not intentionally bad or "good" can mean "good for you."