Worst beat of my short career

[KennyMac]

So I've been playing online for a few months now, and last night got hte biggest beat ever..

PL Cash game
I'm dealt 10/5 offsuit in the Bigblind, 2 limpers, I check.


Flop comes, 7, 5, 10 (rainbow)
I bet 2x BB, 1 limper folds, 1 raises me to 4x BB, I call.
Turn comes, another 5
I bet 10x BB
Guy raises me all in about 25 bets, I call.
River comes, an Ace.

Guy turns over A5 ....

I don't play cash games that often but I would assume everyone would make this same play, and I would have the +EV calling this everytime ? I don't get flustered very much but went to bed thinkin about this one.