The aftershocks of a breakup or a betrayal, might make you feel, as if a ton of bricks had fallen on you. Even with plenty of people around you, it will feel, as if you were the last person on earth. You may be overcome by a feeling of great loneliness.
You'll have to pull yourself out of this, regain your balance and rethink, what you are going to do next and evaluate your situation.There is nothing wrong with creating a bit of distance between you and your environment. This will certainly not do you any harm, and it might help you gain the security that you actually need.
Losing someone who never really respected or appreciated you is actually a gain not a loss.
It's time, maybe past time, to let go of something or someone that's holding you back. It isn't nearly as hard, as you fear it might be, so take a deep breath and get ready to say good-bye.