Should I keep fighting for it?

I've known this guy for 2 years, and we recently got closer. He confessed to me one day that he is interested but at that time I was still confused. Yesterday, which is 2 weeks after he confessed I said that I am also interested.

That night we had our first kiss which led to making out. Everything was fine, we couldn't keep our hands off each other. But in terms of relationship we both agreed to take it slow.

Today was fine too, we were cuddling and then he cooked me some food. Later on in the night he told me he's worried that he is not ready to be in a relationship because he's studying medicine and it's really busy and he wouldn't be able to give me the attention I need.

I said we can give it a shot, just taking things slowly and see how things are but he said it's better to end it now so no one gets hurt in the future?

I feel like you lose all the chances you don't take. What should I do??