How do you deal with overly affectionate friends?

Recently, I start to feel more and more uncomfortable around my friends, I want to push them away again. Especially one of them who is getting very close to me and keeps saying things like she misses me or loves me (platonically, of course). It gives me so much discomfort to hear these things. I also hate that they keep hugging me, but tbh they've been doing it for years and I was too scared to say anything back then and feel like now it's too late.

I just wish we could keep it more casual and surface-level, anything else makes me deeply uncomfortable.