Healthy Ways to Slim Down

Ariah
So my bf and I recently broke up.... It may or may not have had something to do with my weight, IDK. I'm not obese by any standard but I could stand to lose 40-50 pounds... do any of you girls have any suggestions? I'd like to start eating healthier, maybe try some detox and juice cleanses as well. Definitely going to work on my cardio but exercise doesn't do it all. What has worked for you. I'm open to anything at this point, because I'm pretty sure I've tried almost everything in the book and it doesn't seem to do the trick...