stuck

i don't know how one can place restraints on the love they have for another. with all the negativity and uncertainties, part of me is ringing the alarm bells alerting me to protect myself. but i don't know how to be half-hearted in a relationship. so what should i do now? there are many things i don't understand. the person whom i would like to confide in is shutting me out somehow. i thought when the decision is made there would be some firmness, certainty and belief. if otherwise, how was the decision made in the first place? shouldn't you have enough foresight on the future and the person in question before choosing to stay together? if there is love, what can't we overcome with efforts from both? you can pursue your career and wants while i provide the support and encouragement. why is it that things can't co-exist?