I still do not get it...

You know figuring out matters of the heart is not the easiest thing to accomplish.  When I was a teenager I thought I knew what was going on in my heart but was so utterly and completely wrong.  Then in my early 20's I was proven wrong again.  So here I am today and I am still completely and utterly confused.  

I feel like every good relationship requires some work.  However does that mean every great relationship requires a great amount of work?  It should not seem like that much of a big deal when you are truly in love with someone.  It should just be the basics of what you have to do to make it work for the both of you.  You get tired and worn down sometimes but you get it together and keep trucking along knowing one day it will get better.  It will get better right?  Its not going to be an everyday battle... right?
What if you let go of someone.  You need space.  You need to figure it out.  Does that mean there is a lack of love?  Or does it mean you're head is getting to involved in matters of the heart?
Maybe it is my past bad experiences that make me feel like there is an expiration date on loving me.  Or maybe it is one too many romantic movies that mess with my head.
Does questioning something mean that it can't be "it".  They always say when you find "it" you will know.  What if you thought you knew then something just came into your head or heart and changed everything you thought you knew?!?! 
Now here is the hard one, what if you thought you were over someone and continued on with life only to find out that you were never over that person?  Then what?  How do you solve this?  How do you get over someone while trying to love another person?  If a simple mention of a person's name brings it all back.  If it makes your heart race, butterflies in your stomach, and floods you with emotions.  Lets face it you are not over that person.  Will you ever be? Who knows, you obviously never let go of them.  You have been holding on to them this whole time.  How do you let go? Should you let go? How do you stop loving them? 
You can not stop loving a person just because you want to love someone else.  You are always going to love some people in your life.  That is just the way it is. However just because you will always love them does not mean you are meant to be together.  If they have let go of you and you truly love them, then let go.  Let them go. If you really truly love them let them have what is best for them it may not be you.  Just because you can not let go does not mean you are their answer.  
I do not know how it works or claim to have the answers.  Maybe life is an episode of friends and this is Ross and Rachel.  Who knows... seriously who knows? 
Here I am after all of it.  All the love, hurt, pain, joy, and more love.
And I still do not get it...