There's a lot of thought that goes into three simple words.
You learn them when you are young but the gravity of using them correctly haunts you into adulthood.
In english these are words that you would use to describe a parent or a tree and the meaning doesn't really change but the weight these words hold are different now than they were when you meant then towards a relative or an inanimate object.

you love her... and the scary thing is this idea that she might love you too. and that scares the hell out of you because you have thought you have loved in the past but those other loves have all proven how shallow they truly were and yet you choose to use those same words again to express these new feelings.

Feelings so profound that you swear that this time this is the real deal that you have never felt to intensely about anything before and you think that you never will feel anything so intense ever again. but somewhere there is just enough room for doubt.

maybe you have flelt this before in a more pure and potent form but you take a leap of faith in hopes that while it may not be today but one day you'll know that this is the genuine article...

But yeah maybe it's not... and that scares you but a holy man once told you that without faith love cannot be known and so you believe as hard as you can that this is love... the same love that drove romeo and juliet to their untimely demises and broke kingdoms long before their times...

You don't want this to be a lie... you want to love her with all of your heart... and yeah it'll be hard to do that... but you can do it... keep trying...