Flirting

So me and this guy have been friends going on a year and a half and recently we have become really close we hang out all the time we talk about anything and everything that includes his exes mine and sexual things. He was trying to ask me out to homecoming and then tried to invite himself to my mothers birthday party. Now granted he has never met my family nor vise versa. We have never hung out outside of college. I told him about the party but never thought about asking him to go. How can I know if he is flirting with me or if we are just really good friends. He acts like he is my boyfriend lol but I'm not sure. He is 32 and I am 22