For one u dont wanna leave the person u truly love behind because u dnt know if ull find someone like that again. and u dnt wanna get rid of the other one because then u end up thinkin if something great could happen with that person.
I don't think it's hard. Choose the second, if you were really committed to the first you would of never found the second. If you don't like one it shouldn't be that hard for you.
