Feeling Bored Outside of Work

I'm quite young (25) working as a software developer. I skipped university and have work full time (40h/w) for 4 years now. I really like my job and working in the software industry. After work/on the weekends I usually play computer games with friends or go for a walk. But if I do not play computer games for some reason, I am very bored. I used to develop side projects but at some point I lose interest or just finish them. I also feel like I have to do some programming in my free time to learn new stuff and stay informed. But without any goal it's hard to learn a new technology imo. Should I stop seeking for "possible side projects", that can fill my weekend time, and pick up a non tech related hobby?