I'm convinced Enzo's Subconsciously in love with Damon
Think about it. He was a little too pissed about the being left in a fire thing. Then he keeps falling for girls that have strong ties to Damon:
Lily - Damon's mother
Sarah - Damon's niece
Bonnie - Damon's best friend
If I didn't know any better, I'd say these women were all placeholders for Damon and deep down, that is who he really wants to be with.