I can offer some insights based on the information you provided.
The fact that he gave you his beer when you needed ibuprofen could be a sign of kindness and concern. It suggests that he was willing to help you out even if it meant giving up something he was enjoying. However, it is essential to remember that this action alone might not necessarily indicate romantic interest, as people can be friendly and caring without having romantic feelings.
Regarding him staring at you, it's challenging to interpret without additional context. People may look at others for various reasons, such as finding them interesting, admiring something about them, or merely being lost in thought.
Considering you mentioned that he knows you are married but are considering a divorce, it's essential to proceed with caution. If you find yourself developing feelings for someone while still married, it is crucial to address the issues in your marriage first and seek professional advice and support if needed.
If you are uncertain about his intentions or feelings, the best approach is open and honest communication. You may want to have a casual conversation to get to know each other better and find out more about his perspectives and interests.
In any situation involving feelings and relationships, it's crucial to consider everyone's emotions and be mindful of potential consequences. If you're uncertain about how to proceed, it might be helpful to talk to a close friend or a counselor for support and guidance. Remember to prioritize your well-being and take steps that align with your values and long-term goals.