Life goes on and so does love...

What is it? How should I explain it?
a feeling of pressure in the chest,
a mental obsession, always there in the mind,
urge to get lost in your eyes,
urge to tell things to you while I look at you, silently in my own head,
seeking closeness,
I want you to keep my hands,
I want you to hug me and let me stay there until I want to come out and even then, look at me and hug me again...
I know my lips then will seek your skin and then later maybe your lips...
where is the line between love and lust?