At your age or a bit older, I also went through a phase/couple of weeks of stopping on a run. I can't tell you exactly what the issue was for myself but I have a few thoughts:
- I was anemic which contributed to a physical malaise but also a mental one
- I was running too fast on my off days: I would ditch any fitness tracker/gps device you may or may not use and just go for a light jog and see how it goes.
- I was running on a boring stretch of rural road, switching to trails automatically increased my need to consider my surroundings and both be engaged and weirdly switch off at the same time
- I wasn't resting well: get your sleep, nutrition, recovery protocols sorted if they aren't and maybe consider if you are missing something
- I was running during the hottest part of the day for no good reason: not sure if you live in a hot part of the world or if things are getting warmer and you aren't adapted yet, but, if you are as stubborn as I was I didn't get that I couldn't just run whenever and not expect to have my body tell me to stop when I wasn't adapted. Not every run should or can be a test of your resolve, that is what workouts and races are for.
- I needed a break. Despite the trollish advice you'll undoubtedly get here, taking time off or backing off can often be the long term best thing to do. If need be, sub in some cross training like water running, elliptical, biking etc. to challenge your body in a different way for a few sessions a week.
Best advice I can give is to be patient and find that love of running I am sure you have.