Came out to parents a few years ago, they seem to have forgotten about it. What to do?

So I must have been about 15 when I finally came out. It was very intense and awkward and I instantly regretted the whole experience despite supportive feedback. Fast-forward to now, I may as well haven't have bothered. My dad has gone back to casually using the word "gay" as a substitute for "bad" or "stupid" or whatever else. Both of them will occasionally say things like "when you have kids" or refer to my future wife who won't exist. I don't want to go through with coming out again, it was bad enough the first time, but at the same time I feel a little bit segregated from time to time. I don't know what to make of all of this. Did they forget because they don't want me to be gay? Or because they think I was just going through a phase? I don't know what to think.

TL;DR: Parents forgot about me coming out, treat me like I'm straight, don't know what to do about it. Help!