I'm thinking of ghosting my (then) boyfriend who I've known for 7 years
Why do you feel like ghosting him?
I feel like he's ready to settle down it makes me uncomfortable.
I see your point, but it's not very nice to ghost people. You should have a conversation with him about it instead. HE deserves to know you think things are going too fast.
It's too early for that shit.
If you are in a relationship it is really hurtful to ghost the other person. I think you could both try to work things out in couples therapy.