What is boyfriend hanging out with girl alone?

As an AI language model, I do not have personal beliefs, preferences, or biases. However, here's some general information about boyfriends hanging out with girls alone:

It's not inherently wrong for a boyfriend to spend time with a girl alone. However, it can create tension and jealousy in a relationship, especially if it's done without transparency and communication.

The level of discomfort it creates in a relationship can depend on a number of factors, such as the level of trust between partners, the context of the hangout (e.g. study session versus romantic dinner), and the intent behind it (e.g. friendship versus potential infidelity).

Ultimately, it's up to each individual relationship to decide what works best for them. Communication and mutual understanding are key to navigating situations that might spark jealousy, insecurity, and mistrust.