How to manage and build relationships better? Suggested books, articles, advice.

Hi,

When I was younger, I either had kind of close, candid, relationships with bosses, coworkers and peers from work and school, or nothing at all, or maybe even relationships filled with mutual animosity. How do I manage and build relationships better? Any suggested books, articles, advice? But it's something I definitely want to improve. 

Kind of off topic tirade: Also, I don't really enjoy using social media like LinkedIn, or Instagram, which I think might offend people. I prefer sending emails, and it's because social media sites are far more concerned with increasing engagement, and not with building relationships. Given this, at best, it feels like a waste of time to use to maintain relationships. At worst, I think through social media sites' need to increase engagement, and the swell of data (mainly user inputed data such as posts, or images, or job descriptions) that's captured from users as a result of this, using social media, particularly in professional contexts, runs the risk of offending people (e.g. I like a political LinkedIn tweet), and therefore social media sites, as they attempt to increase engagement, makes it more difficult to maintain relationships.