Trouble finding a motivated co-founder

For context, I'm a college student running a consumer mobile app business. I've been working on my own apps solo for about 6 months (both development and marketing), and since I'm majoring in engineering, it's been quite hard to balance running this business with my studies.

This is what originally led me to seek a co-founder in the consumer mobile app space who's strong in UGC/distribution. The problem is that It's very hard for me to find someone who actually cares and is willing to put in the work.

Some past scenarios:

1) I made a profile on the YC Co-founder matching site and got matched with a guy who eventually ghosted me after two weeks. I got matched with a couple of other people as well, but they never answered any of my introduction DMs

2) I met another guy on this one app called "Ambitious" who seemed pretty motivated (he was also a student) and was also interested in mobile apps. But after creating literally 1 single video, he said that he didn't have the time for this and left.

I've tried talking to other students at my university as well, but I don't really go to a prestigious school or one that's known for cs/tech, so not many people are interested in startups or stuff like that.

I'm not quite sure what I should do at this point, so I wanted to come on here and ask for tips and advice for finding a co-founder.