How do you control sexual urges?

I'm a late teen and I guess it's important to learn control over sexual urges. Maybe it's because my hormones are all Acting up but yes I do feel more urge than usual sometimes especially before periods. I do have a boyfriend but uk we can't actually have sex or anything.. One mainly because it feels kinda soon and nor do we have any kind of privacy. When it come to masturbation, I don't feel good after doing it. I always end up feeling guilty. There's this huge sense of guilt after doing it. I'm not sure what else to do