I still pop on every now and then, though like you I'm trying to stay away as much as possible so those bad feelings don't get dredged up.
It's completely normal to have ups and downs. This is part of the process. You'll never be able to completely forget XH and that sadness will stick with you until you have the chance to let it fade as you gather better memories. I have a good friend who's been divorced 5 years (her instigation) and she says in times of self-doubt, she still gets upset over questions of why her XH didn't try harder. So, it's going to be a piece of you, but that's okay.
It sounds like you're doing fun things and exploring life - that's great! Distractions definitely help. Keep up your optimism, outlook is everything.
