If you need to ask the question, "What do you all consider an interesting person to talk to?" to a random group of anonymous Internet posters you obviously are not one. If you need to ask the same group of people how to creep into groups of people you are obviously not an interesting person. It is fucking creepy that you text people you barely know that you met by creeping into a group of people. It is obvious you do nothing interesting as you have to ask this same group of people how to text the people you're creeping an inducement to hang with you.
If you were interesting and non-creepy you'd have friends. In fact, maybe if you were just not creepy you'd have friends, as I've known groups of non-interesting people that hung out together. So maybe you're focusing on the wrong issue? Maybe the question should be, "How do I stop creeping people out?"