Does he like me?! I need to know

So there is this guy that i like who is an Aquarius. We have known each other for a while and I'm not sure if he is interested. We talk/text all day except for when he doesn't answer for hours... but he recently opened my text (he has his read receipts on) and didn't answer me. Which is very weird and unsual. Before he didn't answer, we were having an awesome conversation about life and our expectations. He normally doesn't open my text and not respond so I'm curious to why he would do this.

Side note:he sometimes flirts with me by complimenting my beauty and brains. But has never explicitly said "i like you or want to be with you." In all honesty his personality PERFECTLY fits an Aquarius and it's crazy how accurate it is.

I know i didn't do anything to make him mad bc of our pervious texts he sent in the conversation.

So does anyone have an idea why he would randomly stop reply during a great conversation and after complimenting me—