What now?

I was in a relationship with my dream guy 5 amazing years until about 6 months ago when he left me to focus on himself, his career aspirations and to gain independence. He also wanted to experience the single life and focus on his friends as well. This was like a slap in the face to me and I was hanging on by a thread for 6 months. I understood logically but emotionally it was very tough. I felt rejected and thrown away like a piece of trash. I really questioned my self worth. Now that the weather has been getting warmer, I have slowly felt more like myself. But I am beginning to question what now? I am 22 years old and before I had my whole life planned out and it was such a wonderful life. Now it's a big question mark and I fear the unknown. I also fear if I will every truly find someone because people my age don't really understand the concept of love. I live in a world where people get drunk every weekend, love hook ups and social media. They live for instant gratification and pleasure. They don't understand what building a foundation for a relationship looks like. If anything is tough they bow out. They swim on the shallow side and call it deep. I really want to start building a life but a huge key to that puzzle is building one with someone and growing into it together. I'm scared I won't find anyone who makes me feel like my ex did. So any advice or suggestions would be greatly appreciated.