Life Buddy
Friends who are always there for each other.That they'll see this life through together. They live separate lives but they’d always be there. Even if they don’t speak for five years, their friendship would still be there. Additionally, life buddies are entitled to care for each other.
She is my life buddy even though we live in separate countries and have not seen each other for a few months because we went through a lot with each other.
Life Buddy
Two people who care about each other and decide to hook-up and be monogamous without the actual emotional investment that one may put in a official relationship (more than just friends with benefits).
my best friend and I decided to be life biddies(plural of life buddy)