Not bad!
I love the lyrics!
But i have a few things that I want to suggest,
Firstly, the volume of your vocals seem a bit too dominant/loud, what I suggest is that you slightly lower the volume on your vocals so it blends in more with the instrumental
Secondly, this is just from what I've noticed from listening.
The vocals seem slightly out of time in certain places, but it could be me.
Another suggestion is to maybe add a bit of reverb to your vocals to give them more depth.
Otherwise, this is a great addition to an already great song!