I do not know what you are calling a "relationship" if he is not there with you. How often have you seen him in person in the six months you have known him? Is there any plan to get in the same location together anytime soon? As much as I might enjoy talking with another online, on the phone, video chatting, etc. that still leaves a lot to the imagination; if you have not "done" anything together, do not have any experiences/activities in common you don't really know how it would be like to be with this person, it is all just words/talk.

Your parents have had an actual relationship and the experiences; they know how difficult it is and are perhaps trying to share that with you but, we all have to make our own mistakes (and successes).