Why does it always happen to me?

I’ve been on 3 dates with someone. And it was going good. The following week I decided to ask him out and he said he’d be okay with a walk and having a chilled weekend if I wanted too. For some reason I took that as he wasn’t interested... we both ended up working anyway. He’d always been flakey with messaging and at times I felt he wasn’t into me because he didn’t message much so I acted cool. Then he’d message later in the day and I’d feel okay. The following week I asked him... ‘would you like to see me again sometime or?’ His reply was ‘yeah I do, I just don’t feel I’ve enough time... I’m working and as soon as I get home all I want to do is sleep, maybe when I get my hI get my house sorted I can cut back the hours and find time’ he does work long hours and is looking to sort a house and I also know past relationships have failed because he works too much... I replied saying basically I sometimes felt he wasn’t interested and I just wanted to know where I stood.... he said he wouldn’t have taken me out if he wasn’t interested... I don’t want to delete you or anything you aren’t like others girls out there you’ve got your head screwed on etc I just don’t think I’ve chose the right time to start dating... I basically said if you like someone you find time even if it’s only half an hour a week... his reply was ‘that’s exactly it I should be finding time but I’m not, I’ve had 3 good dates and I do like you but I guess I’m not interested sorry’ I left him a couple of days then asked him what he meant... and that I understood he worked long hours and I didn’t want to throw it away... (I felt like I’d put into his head that he was too busy) and then he’d called my bluff. Anyway his reply was that ‘I thought I was ready for dating but I’m not, I don’t see much point if we are barely going to see each other, if I had my own place maybe we could spend more time together, I’m never at home I’m always in my van or fishing’ I know he doesn’t get on with family etc... we had a joke after that then he stopped replying.

A couple of days later he sent me a snapchat... of kind of an inside joke. Then nothing since. I’ve sent him a few snaps a few days apart but he didn’t reply and they were ones that I sent to all my friends.

The only thing I can think what I’ve done wrong is after the third date he placed his hand on my leg... and I didn’t respond... but I did go in for a kiss after that.
But I don’t see how that’s affected anything because he kept messaging after that.