Should I tell him it’s over or let him slow fade me?

I’m pretty sure my boyfriend is slow fading me.
It has started a while ago and we talk and see each other less and less.
He stopped doing usual sweet things for me. He even stopped his usual messages.
For example, yesterday he was home all day. He was working but no boss looking over his shoulders.
It took him a whole day to respond to my message from a day before.
When he finally talked to me it was almost 11 pm.
I feel rejected and alone.
I want to tell him I’m not happy and that we need to break up.
How would you handle it?
Should I tell him it’s over or let him slow fade me?
Post Opinion