Remember the first time you ran that mile, the first time you you pushed play, the first time you lifted that weight? It was hard as hell...and now, you are better, stronger, faster...because you have trained. It doesn't get easier you just get better!
Yes. It's about seeing that person in their darkest time yet still choosing to love them. That is love. No relationship is perfect. There will be fights and dark times. But when you truly love someone you work through it.
To become real changes from within, the decisions should become something permanent, otherwise they really aren't changes at all, but deflections. Real change becomes part of you, part of a new you, leaving the old part of you completely behind.