no need to get pushy i think, they might be in denial or maybe they are just trying to support you by not making a big deal out of it. just go along with your life and the next time the opportunity presents itself (like if your mom sez "hey alex, look at that
mamacita, why dont you ask her out") then you remind her.
this could be alot of back & forth, but eventually you'll win, so my advice would be relax & get on with your life; the hardest part is probably over.
now if you wanna have a heart to heart w/ the parental units about how they've taken the news, maybe have one separately with each. "hey dad, can we talk...?" "sure dude..." etc.
parents have a way to react as a team sometimes that alienates them from their individual mind. my dad, for example, is a very relaxed dude, but with my mom around, he fell into this "authoritarian dad role" while we were growing up. i think he did this as a reaction to my mom's anxieties, to protect her somehow.
anyway, best wishes man.