I gained ten pounds
What made you gain the weight?
Because I have to eat everything
If you dislike the weight you've gained, it is a good idea to moderate your eating habits so you can lose it again. But ten pounds is not a lot of weight to gain, so you shouldn't get too upset about it.
It is a lot of weight. I'm fat now and my boyfriend is going to break up with me.
It's always a good idea to try to maintain a healthy weight. Just make sure that you are doing it for yourself and not for somebody else.