This one is sort of a lose/lose situation. If you say something to her, she’ll get defensive and just think you’re jealous of the close relationship she has with her snuggly wuggly schmoopie bear. On the other hand, if you bite your tongue, you’re just enabling her sickly sweet behavior. She’ll turn into one of those people who writes lengthy Facebook status messages about her “snuggle monkey,” and then comments on her own post when she hits the character limit.
You’ve already asked her to tone it down, and nothing changed. Explain to her that you love spending time together, but you can’t be in her presence when she’s with her
boyfriend. She might get mad, and pull away, but that’s the risk you have to take right now. The best thing you can do is to let her go through this phase and hope she eventually calms down.
She’s in the early stages of the relationship, right? It’ll even out soon. Eventually they’ll come out of their snuggle cocoon and realize that they suddenly have zero friends. This will be the point when they decide whether to be one of those couples who spends all of their time together, or tone down the cutesy, lovey dovey vomit-y stuff in public.
On a related note, apparently studies show that couples who create cutesy nicknames for each other are more likely to have long-term potential. Ugh. If you’ll excuse me, I’m going to go vomit up some unicorn horns.