Honestly it's kinda already at that point... My home life is in shambles, I can't truthfully say there is anyone I actually enjoy spending time with. My life has literally been one stab in the gut after another for years upon years. I'm just barely on the not doing side of actually killing myself.

If you're afraid they won't believe you, then maybe it's best if you wait until you do find a girl you really like. That way, when you tell them, they'll see that you really do have feelings for another girl that are more than just an experimental phase.