Most Helpful Guy
Usually needs aren't being fulfilled in some way
Or the relationship fizzles because who you thought the person is, isn't.
And that's okay,
Quite literally most relationships fail for one reason or another. Most of them. It's going to happen.
Be who you want to be and as open and honest with your partner about everything and anything. One of you may have desires or ambitions that are difficult to talk about or even be aware of.
The more effective you are at communicating, usually the better you'll be at dealing with problems she tackling them with your lover.
Check out the 5 love languages for starters, and learn about what makes people happy generally. Just don't pretty people walk over you
Most Helpful Girl
Well, maybe if one of them isn't happy in the relationship or doesn't feel respected/loved. It's one big reason.
But sometimes (very rarely in my opinion because you can always not give up) something that just happens in life gets in the way and somehow they can't help but to grow apart