Keeping the weight off

I started setting up healthier habits last autumn, including regular running sessions and home workouts. I lost weight and reached goals I was setting for myself. The more I was losing weight/toning, the more positive feedback I was getting from people around me and I think it triggered something very unhealthy in me and now I'm rather obsessed with staying fit, to the point where I'm extremely restrictive with food and it even stresses me out when I'm not preparing my own food. I've reached what I think is a good weight for me, and a physical form I like but now I don't know what to do, I've seen so many stories of people putting the weight on again and I'm utterly terrified of that happening to me. Would anyone have any advice as to what I can do to keep the weight off and keep my body the weight it is now?

Thank youuu xx