Whats the difference of soulmates and normal relationships?

[Rainbows]

well, my crush, said that we are soulmates. yeah, i did agree on what he said (but i have no clue on what soulmate actually meant lol) and in twitter he said that his crush liked his photo in instagram (i never used insta.) so i kinda like 'indirect' him and he texted me whats wrong, etc.. and keep telling me about that we're soulmates.

can someone explain whats the difference between soulmates and like lovers(normal relationships, bf&gf?)
yeah , we're kinda close , & i like him, he probably like me too, he makes me happy; most of the time, esp. when im sad , he will be texting me everyday, and asking me whats wrong if i cried, he is a sweet person.