Most Helpful Guy
I don't think you look like a cougar, lol. As a 27 year old male I can tell you I'm very different now to when I was 21. Everyone changes through different stages of life and that change can lead to people growing apart. That's not a reason not to go for it, but it's something you really need to bear in mind going forward.
Most Helpful Girl
I don't consider it too big of an age gap.