Yikes, you just broke up with your boyfriend of x amount of weeks, months, years and don't know what to do. Well I have some advice for you! Become the best you possible. Focus your attention on bettering yourself, the best way to do this is ask Christ what he wants you to do, be and make of your life. You're going to have so much free time on your hands that you should take up a new hobby or expand upon current ones. Maybe you should take a vacation or go on a shopping spree to clear your mind, but at the end of it all make sure you spend some quality time with Christ.
Each chapter in our life has a specific purpose, so do not be sad about singleness, but EMBRACE IT. Know your worth and focus your life on Christ. Do not resent your ex or hate them, but move forward. Look to the future and appreciate the past. Sometimes things just don't make any since, but that doesn't mean that they are wrong. Good things fall a part so that great things can come together. Never doubt Christ's plan for your life and never give up on yourself.