Saying "I like you but I'm too busy" is one of the most common ways people say they're not interested when they don't want to hurt your feelings. Sometimes people text here and there with no intention of ever dating you because it's an ego boost and it makes them feel good to know people out there like them-- but they aren't actually interested in dating you. You're just an ego boost when they're bored. I don't want to sound harsh, but it sounds like you aren't picking up what he's putting down. This guy just isn't interested. If someone is interested, you won't have to chase them. Trust me. I took down my online profile in August because I'm working 80 hours a week and have no time to date. Ive said no to everyone who has approached me in the last few months. Then, just this week, I randomly met someone I clicked with. I really have zero free time but I like her so much I'm going to make time to get to know her. She didn't have to chase me or beg me or wait around for me to be less busy. I like her so I WANT to make time with her, even if it's difficult. That's what it should be like when two people are interested in each other.