19F, is it alright if I try to find my boyfriend, 20M, who suddenly disappeared after two months?

My boyfriend and I met in college, where I was a senior and he was a junior. I first noticed him at an event and developed a crush. After finding out his name, I ended up looking him up on social media. Despite being quite popular and having many followers, I took the plunge and texted him first. I'm generally shy and introverted, but we instantly clicked and quickly realized we had strong feelings for each other. We decided to start a relationship and went on several dates. Recently, however, he has become distant. He drinks and smokes, and one night while he was drunk, he broke down and revealed that he has a serious illness related to his addictions. It was a shock to see him show such vulnerability, as he’s usually quite reserved. When I pressed him for details, he was reluctant to share but did mention he was going to see a doctor the following day. When I asked him what the doctor said, he claimed everything was fine. Ever since that conversation, he has seemingly vanished. I’ve tried reaching out through calls, texts, and emails, but he hasn’t responded and is not even active on social media. He hasn’t blocked me, but it's as if he has just disappeared. This is puzzling, especially since he used to be very clingy and would struggle to go a day without talking to me. Now I’m left wondering if I should reach out to his friends to check on him. They don’t know me well; some are familiar, but most aren’t. Do you think he’s trying to distance himself from me? Should I make more effort to get in touch with him?