Michelle,
I think about these things a lot too. Social media is something I've been reflecting on lately and its effect on society. There's a lot of competition on there, and I think it paints a false picture of "success." Also, so many people try to compete against each other for attention/admiration and set unrealistic standards for themselves, which drives people to attach too much importance to how many likes they receive and the need for constant validation. Personally, I stay away from social media the most I am able to.

As far as the struggles you are experiencing in your relationship and with mood swings, I really empathize with you. It's so hard to struggle with mental health issues, and you just want the people closest to you to understand so badly. I'm still going through these types of issues with family. I hope you have either a T or pdoc, who you trust that can help you. Hugs.