First: Do you accept Miku in your heart?
If yes, then enjoy the ride that is called love, don't worry at the beggining no one has the capacity, it's something you gradually get from learning from your mistakes.
Everything will be alright, I'm sure that those difficulties are a lot smaller as you might see them now. Don't worry I also was afraid of that issue at the beggining.
If Miku doesn't convince you then, Is there someone out there that does?