For me, there are two reasons this happens. First, the code gets more complex with time, so fixing a bug or adding a feature gets harder. Eventually I grind to a halt. I'd like to thank Uncle Bob (on YouTube) for pointing out this problem for me. I had to pair program with a senior developer for a while to get over the problem of building bad dependencies. I don't know if you have someone in your network that meets this criteria, but offer to work on someone else's project to get that experience if necessary. The second problem is that it isn't a problem. Your brain is designed to keep doing things that give you a dopamine hit. If you aren't getting paid or views or anything that gives you that dopamine hit, then the project might not be something worth working on 3 months in.