I have been steadily working out every other day for weeks, with few breaks. The most recent one was Spring Break. For months now, I've been benching slightly above my weight at 155 pounds. I'm usually able to work up to heavier weights after a bit, but I just keep failing to do 3x5 at this weight, flunking out around the second or third rep of the second set. Some days are better than others, but I can never do the full 3x5. I haven't made any major changes to my form.

What am I doing wrong?