There's always too many things in life that you can't bear to let go but as time past by, you'll come to realised that no matter how much unwilling-ness there is, you've not no other choice but to let go.
Overall, thats life, its part and parcel of life and its a one whole circle process.
You can never understand another person well enough because i believe you don't even understands yourself very clearly. sometimes its better to let go when you feel that the other party all th whole process is hurting you too much. whats th point of letting yourself suffer everything knowing that th whole process is gonna hurt you very much too? whats th point of holding on to something that's useless?
what's th point of letting every single one of your friends calling you a fool and you know they will be congratulating you when they know that you've finally walk out of th cave.

On th other hand, don't always assume things from your point of view.
sometimes in life, you should always look out of th big picture.
Remember that everything happens for a reason. You might not feel/think like how th other party tells you to but sometimes it is like how th other party said. Put yourself in another point of view and you might have another picture in your mind. think about how he/she will feel if he/she realised that you dont even understands her right from th very start. don't fucking assume from your point of view.
Just remember clearly that every single things happens for a reason. (: