What do you call someone who is easy to relate to? For example, someone who has been through something you have been through, like similar life experiences.
Do you mean someone with whom you have good camaraderie? Someone whom you find it especially easy to relate to; Or are you describing someone who is generally an all-round popular guy, who makes friends easy, and is easy to be friends with?
If it is someone whom you personally can relate to, you could try "Kindred spirit"
If it's someone who can easily relate to everyone, you could try "Sociable?" "Outgoing?"
gre·gar·i·ous fond of the company of others; sociable.