Sasha,
i think that if he truly loves you then you have nothing to worry about...to help gain the trust of your parents, let him be involved in thier lives....even simple things like him helping to cook dinner, hanging out privately with dad....let him become close to your parents...when my sister first was dating her current present husband my parents were not sure about him..but he came into our home and connected so well that he quickly became part of the family....there were still differences, but we came to accept them...and my sister is now happily married!!!! people are scared of things they don't know..so let your parents (and the rest of your family) have lots of opportunity to get to know him...don't try to use words to convince them...let them see for themself...if he is as good as you say he is, then that will not be a problem..if not then maybe you should find someone else..
good luck,
RIchard