Has anyone felt that they've been taking too long to make a single game? Like they've been distracted with life, work, studies and the like, that the motivation to develop your game just isn't there, even though you feel like you want to?

I feel that way with a game I'm working on  - I started development back in June 2015 and it still hasn't been completed yet (just 1 level left to make, along with ending sequences, beta testing, few sounds left to make, and final tweaks). Little by little I've been making progress, though I feel like it shouldn't be taking this long.

I've been told by my friends that good things take time, but still...

Oh definitely, this resonates with me. A year ago I started development on my game and the first two months went really good, I had a good routine and the progress was very noticeable. But as soon as my college lectures started again, I began working less and less on it, and by the time it was exam period - I barely even touched the game. Then came various life things and as of this moment, it has been 8 months since I last worked on it. As much as I hate to admit it, I needed to set my priorities straight and sadly, the game had to tank. 

I'm starting to settle however, lately I've found enough time for gaming so it's not like I don't have the time anymore, I just need to reignite that spark again - I did burn myself out.

I have done this to myself. the trick is to set a very small goal then after that go distract yourself like go to the toilet, drink some water, or doing something then, do repeat it there will be some part of the project that make you focus. if the project get stuck you need to get rest and thats my advice for you