I think i am 'lovesick'.. ?

i REALLY like this guy and every time i see him i feel sick and i feel so weird, sometimes i actually can't breath when he comes near me. i think about him constantly and people have told me all this bad stuff about him but i don't care, i want to spend the rest of my life with him and that but am i being silly? or am i 'lovesick'? do you believe in soul mates? that's how i feel, like we are meant for each other. im only thirteen but im 'older than my years', if that makes sense. thanks(: