First of all. To be clear, breakups sucks, they do. Because you feel pain of losing the one you loved and you also feel fear because now you are left there far away from the comfort and a major part of your life has been removed. Some people jumps into instantly, others get the feeling of it eventually. Of course, some breakups are more easily to handle than others, but that depends on how good the relationships really were and the person you shared it with was. However the good thing is that you will get over it and start being the person you was before all that and you will develop even more.
See it as an opportunity to discover more of your true potential. Because honestly I don't think many people do know themselves until they discover it the hard way, they do so by being tested of things they are not used to. If you think about it. When you are in a relationship you do all you can to provide stability in it. You might not think about it, but you as a person change or with other words adapt to be the best version suited for the relationship. That is not a bad thing, you should give your all and the pain you feel afterwards is just a proof that you did your best and gave all you had
Being single is all about reclaiming the person you are and set your own path and strive for the person that you want to be. You have the freedom to do whatever you want and build more on your own beliefs and purpose which provides big changes in your life, hopefully in a positive way. So be grateful for what you have experienced, but be more grateful for what has been given to you afterwards. Many people tend to jump between relationships because they are too comfortable with the feeling of having someone and feel needed. But personally I think that is wrong and I do not think you will feel much better just because you switched partner. However, that might be because I do not feel ready to jump into another relationship just yet and I also want to do things my own way for the moment.
So feel awesome instead and start investing in yourself. Set your goals, hang out with people that you feel comfortable with and meet new people, get out of that comfort zone, because every individual has it's own story and every story might be interesting and you can learn much from them.