Always checking social media feeds to find out where their partner is, who they are with and then question them about it, or reading personal emails and checking texts is not normal and can be part of a coercive and controlling relationship. On Safer Internet Day there are ways people can protect themselves from abuse, not from a stranger, but people who say they love them. More information here - https://www.womensaid.org.uk/.../what-is.../onlinesafe and here https://safelives.org.uk/