Should i message my ex??

okay so me and my ex split up a few months ago due to his busy schedule and he said he just wanted to be friends. So i was obviously depressed af after it but i agreed. So even though we're supposed to be 'friends' we havent spoken properly since we split up. Oh and he ignores me in college, doesnt even say hello. I know some people will say that i shouldnt waste my time but i do genuinely miss him and want to see how hes been getting on, the thought of never hearing from him again really scares me. His brother also told me that he has a habit of making situations awkward that really dont need to be. I just really need advice at the moment because I cant seem to clea my head 😞😞