Do you ever miss the feeling you felt when you were first in love?

I’ve been in a toxic relationship on and off for 6 years and I feel it’s officially reaching its ending stage. Pictures popped up in my memories on camera roll of him and I when we first started dating and I feel so sad because I miss the feeling of how things used to be. How into each-other we were, no arguing, no trust issues, heartbreaks just fresh and happy. I don’t know if I can ever be so vulnerable and love and give someone my all again..I actually feel like this relationship nearly broke me. I watched someone so in love with me turn cold, mean and heartless. Man love sucks