One of the worst things that can happen is to have a guest over that won't leave. At least for me because I'm too nice and will say just about anything but, "you gotta go."
I have always struggled with this scenario, being socially awkward I never knew how to politely and effectively end my guest's visit. What I would normally do is start yawning uncontrollably (if it's late) which would be a pretty clear indicator that I am tired, and one should leave. If that didn't work, which has happened several times, I start cleaning. If we have had something to eat or drink, I take any applicable dishes to the kitchen, load the dishwasher, wipe down the counters, etc. Sometimes the hint gets picked up, other times they might offer to help, or just continue to watch TV assuming I have some sort of OCD and can't relax if there is a mess (partially true).
If my unwanted guest is still hanging around, I take Bella outside. Everyone knows once you take your dog outside at night, that's the last chance they get before bed. Meaning, it's bedtime. Visit over. I usually have a blanket on my couch at all times because it can get cold in my living room so one of the final measures is always to fold the blanket and put it in it's storage place, therefore eliminating any sort of comfort or relaxation. The whole time during this process I am usually saying things like, "I am so tired," "It's already 12? I'm going to be so tired in the morning," "What a long day this was" so on an so forth.
Unfortunately, I have had to do all these things in one night. In fact, every time this person came over we would go through this. He would never pick up on the hints! I would cringe a little bit when he came over because almost immediately upon arrival he would take his shoes off (for comfort- not because I require it). I knew I was doomed at that point.
I may not pay attention to as much as I should, but I pay attention to social cues and body language. I can't speak for women who wear out their welcome because I have never been one to do that, but guys- get the hint! If you have had a nice visit and there are no other plans, excuse yourself and let the lady breathe. We can't miss you if you never leave, ya know.
Helpful hint, if your gracious hostess has dealt with you lingering around for what seems like hours and you finally decide to leave, don't call once you get down the street and ask to stay the night! Here's a clue, if she wanted you to, she wouldn't have walked you to her door at lightning speed. Also, that really puts someone on the spot and if she's polite, she won't want to hurt your feelings so she will make up some excuse because she's under pressure. I just would expect any future "get togethers" to be in public. In separate cars.
As I read through this, I realize how much I don't miss dating.
Thanks to C- you always got the social cues, ironically, I never sent you any.