Most Helpful Guy
There's no magic to it. You just work it out of your system.
Most Helpful Girl
It's only been a month since you broke up? That's pretty recent, honey. I think you were dealing well with the situation by seeing your friends and family and keep yourself busy or focused on something.
I don't know what happened between the two of you. Did he hurt you? Because something happened for you to break up with the guy and to him being "all apologetic" after that.
There's not trick, magic or anything like that. It takes time. Months maybe. Believe me. Time is the only cure. You need to be patience with yourself and your feelings. I think you should block his number if he doesn't stop text you. Or delete his number or don't reply to him anymore. You just need to start doing what you were doing before. Keep yourself busy and surrounded by good and positive people. Go out, be with your friends, spend time with you family and loved ones. Get a hobby if you don't have one yet. Just don't let him take over your thoughts and life. You'll forget him one day.
Hope I help.