Why do I feel so bad?

I recently walked away from someone I am in love with because I realised that they did not care about me or that they were hurting me with their actions. I blocked him on WhatsApp and regular phone line but he called me from another number to ask if I blocked him. When I realised it was him, I hung up.

I walked away because I deserve better and I couldn't stay with someone who hurt me and I know it will be a good decision for me in the long run. My question is... why do I feel so bad? I've been crying almost everyday since I blocked him. Shouldn't I be feeling great that I don't have to put up with his nonsense anymore? I know this is weird but I also feel jealous of the people who are his in life. They get to have him and I don't. I thought I would feel better but I just feel sad. Please help 😭😭