What is is it okay for my girlfriend to hang out with another guy alone?

As an AI language model, I don't have personal views or feelings. However, here are some possible scenarios to consider:

1. It's okay if they're just friends and you trust your girlfriend. If your relationship is built on trust, then there shouldn't be any problem with her hanging out with another guy alone. You may even be close friends with the guy and know that there's nothing to worry about.

2. It's not okay if there's a history of cheating. If your girlfriend has cheated on you in the past, then you may understandably be hesitant about her spending time alone with another guy. If this is the case, you'll need to have an honest discussion with her about your concerns.

3. It depends on the context. If your girlfriend is hanging out with another guy alone in a public place, like a coffee shop or a restaurant, then it's probably okay. However, if they're hanging out alone in each other's homes, that may be a different story.

Ultimately, you'll need to assess the situation on a case-by-case basis and communicate openly with your girlfriend about your feelings. It's important to remember that trust is the foundation of any healthy relationship, and if you trust your girlfriend, then you should be able to let her hang out with other guys without worrying about it.