Sup alpha men of internet,

Gonna keep this short since i need a specific advice: Had a plate HB8 who slowly but surely developed extreme oneitis for me. Used to have sexual conversations all day long, sex was insane and I tried a lot of things with her and taught her well, shit was fun.

Now she has developed extreme oneitis, is very emotional all around and sexual convos turned more into "relationship" stuff, and talk about us. I had to let her go. I am in an LTR, but rotate couple plates, so getting rid of her is not a problem at all, but I can't help but feel annoyed at this shit, since the sex was really good and frankly better than with any other plate (even hotter ones).

Question: WTF do you do if your plate gets oneitis for you and confesses feelings and shit? Do you just end it on the spot (Thats what I did)? How do you prevent that from happening (Act beta maybe)? Any similar situations? How did you handle it?