I just need advice on how to get over this to feel okay again and not to feel soo bad
Since you asked for advice, this is my answer. It has helped me because I've been in two relationships that dissolved. Yet those breakups did not hurt me because I had previously begun practicing Buddhist meditation. Specifically a part of it called emotional Non-attachment. Self-explanatory because if you look at the words, it already tells you what that means. Buddhism informs us that much or even most of our suffering is due to Attachment. So the Zen meditation teaches us how to Detach. After several months of discipline, it will get to the point where you don't get attached in the first place so it will be much easier to reorient yourself to a new situation.
If you search on YouTube you will find free videos of Buddhist master Ajahn Brahm who gives lectures, some of them on Non-attachment. But the words alone won't help unless they are reinforced with meditation. So Ajahn Brahm conducts those actual meditational sessions on youtube.
Buddhism is nothing supernatural at all but instead teaches practical down-to-earth techniques on controlling your emotions. That's why it has been called the practical religion.