How can i up my bench more?

okay it'll be my third year playing in my senior year.I just wanna know if there's anybody out there with any workout secrets or hints.it's not so much benching, i weigh 135 and i can rep 165 at ease, max 190.
it just seems now aday's that i can't go up anymore. it's been like 2 weeks and it has'nt gone up, there's times when it did slightly but i end up hurting myself more than helping me go up.
I take those protein shakes but still nothing.
is there anything else i can do?
Answer:
Try taking HMB.

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