What should I do????

I have been with my boyfriend for 3 years & 4 months. He was being distant because I am in college, but we still had a good time. It is now my second year in college and now we barely talk (up to 12 hour replies). He says it’s because of work, but I know it isn’t because he always made time. We had an argument over him not wanting to party with me, so I blocked him. I take it as a break up because we hadn’t talked for weeks. I am now sick because of the added stress. Should I try even though he isn’t? I don’t remember a time without him, but my family says I’m young and time will go by fast.