why do i do this? How do I stop?

[ScottTheFish]

Hand #1 you just can't get away from it. Don't make "reads" based on fear. If you never folded top set in 100NL for the rest of your life you wouldn't be far off optimal play. We're allowed to go broke when we flop a monster vs. the one exact hand that beats us. No read is that strong.

Hand 2, I'd fold preflop, but if you call a raise with A8, that's the flop you're looking for. Top 2 is hard to get away from on that board with those stack sizes. Maybe with a very unusually solid read, not often. You'll stack top pair much more often than you'll lose to a set there. Think long term.