heads up advice please

playing heads up against loose agressive guy wer playin 10 25 cent

im up to 145

hes got 50 dollers

hes re raising alot pre

so i 4 bet him wi a10 clubs

flop comes

567 rainbow

i bet he flats

mayb i shud stop bt turn comes a k

so i jam he has 30 more behind him

he calls and shows 44

river brings a j

hes abit of station so shud not av made this play on turn, wud it have been more suitable play on river? after re starting playing btw i got from 600 to 800 dollers in a week then took a shot at 1 2 on tilt and went bust, had 10 dollers left from rake and built tht back up to 570 in 10 days not bad eh, thts the last time i play way out side my bankroll after losing big sums twice doing it i think iv finally learnt,im running at 28% roi at sngs 5 or 10 doller ones and 10 bb/100 playing 10 25 hu , i dont need to get greedy and go higher , if im patient iv started 2 realise im tht gud il be there soon nyway