I don't like that raise. Players at 2NL don't fold enough to raises which means we can raise for value a little wider and shouldn't bluff. Could 3bet pre against 73/18 and then probably just x flop because on AJ7 I don't expect him to fold much to a c-bet either. He has a lot of broadway cards that either have a pair or a gutshot.

I think on NL2 the best play is to just... you could call 1, see if you turn the nut str8 or at least BD flush. Also your raise is so small, the loose player will call, almost 100% of the time and give you a hard time later (as he did). However, if you did bigger raise it would cost you a lot more and effectively have the same effect as an overbet, which might not be a great play on NL2.

Basically, at NL2, be as straight forward as possible, advanced plays (where you do some crazy bluff or semi-bluff like you did with actually little equity, probably, or even if you're ahead you won't stand the heat), keep them at minimum, don't put money in where you're likely behind and the loose enemy often has Ax or will still call you because of small raise size with his missed pair or 2nd pair or whatever.