GermanFucker makes a very forceful arguement. As does boiznuts. The not horned up nonsense is to stay NEG, and do the things that would allow you to do that. If your desire is to have a wife and kids, the most logical way to do that is to play safe until you are in a committed hetero relationship. It needs trust, honesty, etc. That is the only fair approach for someone you love enough to want to settle down with and have kids. Most certainly a rewarding life.
In reading your post, it seems that you have some ambiguity about your sexual identity. Until that is sorted out, reallly sorted out, it would be a wise choice, and it is a choice, to remain neg.
Converting to POZ changes things. And it is not a decision to take lightly. poz, proud, know my gifter here. no regrets. but it was a clear eyed decision on my part.
I would be more concerned about the long term effects of 'partying' with tina, g and other chems. they can really fuck up your life, and not just your sex life.
Not sure if this helped. Just my thoughts.