I don't think you will because if you box, its mainly muscle weight.

jack3763 wrote boxing for a month or two and gym for about a month i train boxing on mondays starting on saturdays soon and gym atleast once a week and yeh ish build and im not that tall im 5"2

What about your age? If you are quite old, your body has already fully developed which would gain weight and your not even that heavy anyways.

I'm 68kg which is 10.7 stone and I'm 5"11. I used to be 60kg but since I have been lifting weights I have gained 8kg.

im 13 like i said in my other comment