There is this guy that I have known for a long time that has been acting flirty towards me lately. For the past month, we have seen each other every weekend (mostly with other people), talked every couple days, he asked me to meet him to have coffee, we have watched a movie alone, he invited me (and not any of our mutual friends) to go out with him and a friend, etc. He has never done anything like this before, we were just friends who never saw each other very often. When we talk, sometimes he says flirty things and sometimes he doesn't. Also, he doesn't text me first very often, it's usually me. We have talked every day for the past week, and I started 4 of those conversations myself. Based on things he has said to me, how he acts around me, etc I feel like it's possible that he's interested. Tonight would have been the perfect opportunity for him to text me to hang out but I haven't heard from him today at all. If he is, then why doesn't he make more of an effort?