It sounds like your trying to do something similar to what I did in high school trying to make the jump. I was at ~45 miles a week, then the next season I jumped my base phase to 80, next season 90, and finally 100 after that. If you're lower than 80, don't jump all the way to 100 in one training cycle.
I found the following schedule was easiest for me:
M: 10+6
T: 10+6
W: 14
R:10+6
F:10+6
S:18
S: 4-6
The real easy day on Sunday helped a lot, and I didn't have enough training years at mileage to make a longer midweek or long run very doable. This took me 11.5-12 hours a week, 13 is definitely pushing it.
Ultimately the jump really helped me and is the reason I ended up being able to run D1. It was also the reason I spent most of college injured because I prioritized miles over lifting and stretching so much that my form slowly deteriorated.
Don't focus on being a runner so much you forget to be an athlete.