First of all, I think you should get to 220 lbs. (at your height) before you start worrying about your "weak" or "small" bodyparts.
Having said that, I know you won't listen or care about my opinion. Try to switch some things up if you're not progressing. You want to find productive exercises that allow for some major (poundage) progressions over time. Try PJR Pullovers (or some cambered bar modified version), Reverse Grip Bench Press (I use the smith machine for these and CGBP), and your dips - maybe add some weight and do a widowmaker too.
Don't kill yourself.