Torn between family and boyfriend...

I always feel like I need to choose between my boyfriend and my family because they don’t see eye to eye. My family thinks he is not worthy, and he thinks they are snobs who can’t take him seriously because we come from different financial backgrounds. I understand their reasons, but this is ultimately bad for me because it always makes me feel guilty or abandoned by one or the other. It is sometimes so stressful that I have to lie, and my mental health constantly takes a beating because of what I am dealing with. If I break up with him, I know it will make me resentful towards my family. What should I do?
These are all adults involved and they are all presumably interested in your well-being. Their reasons may make sense to them because people can justify anything to themselves if they want to, but the fact remains that what they are doing is causing you harm. You have to be true to yourself if you want to focus on your mental health, and that starts with standing up for yourself and calling out behaviour that is harming you. Always speak up. Speak to your boyfriend as well as your family members about what they are doing, why it’s wrong, and why you don’t intend to let this behaviour continue. What you choose to do with your life is your decision alone, even if your family may think it isn’t. Tell them why resentment can ruin your relationship with them and speak to your boyfriend about the pressure you feel. If you need to take some time to think about this, do it until you feel strong enough to address this situation with honesty and clarity.

My boyfriend’s extreme jealousy is straining our relationship. How do I get him to stop?
If he isn’t taking your concerns seriously and acknowledging that jealousy stems from a lack of trust, he is only hastening the demise of this relationship. Explain it to him in these terms.