Are you doing any other accessories?
If you're having trouble with the bb rows, I'd add seated rows and 1 arm db rows to your workouts. For shoulders: Arnold presses, Rotator cuff work, face pulls, and lateral raises. You need to build up everything.
Additionally, how's your diet?
Are you doing A/B days for the lifts? The issue with stronglifts is that if you're only doing the main lifts you tend to plateau pretty fast because you're not hitting the parts enough.
I will add that you've plateaued really fast. I was squatting 185 for 3x10 at 160 lbs and 5'10...for frontsies.
Are you actually having issues doing the lifts or are they just becoming hard? There's an important distinction here.