I run 7–8km every day but keep eating so much that I'm gaining massive weight

I was too lazy to change the batteries in my scale, so I haven't weighed myself in a couple of months.
My weight went from around 71kg to 76kg.
I wasn't really paying attention and just eating whatever, and since my muscles were getting a bit bigger,
I was satisfied, but I'm in shock after seeing my weight lol.
No wonder I was sweating like a pig all summer long
and struggling to get by; I just thought this summer
was exceptionally hot lol.