I suspect that the best advice would be - relax. It may be that you're becoming so worried about getting it wrong that it's becoming a self fulfilling prophesy. Landing is the hardest phase of flight but it 's not that hard otherwise I wouldn't be able to do it - once you crack it you'll wonder why you hadn't done it that way before. Many years ago when I first started flying (in gliders) I just didn't understand the flare; I couldn't work out where to look, what to do and when. After a number of dreadful barely controlled crashes I flew with yet another instructor who gave me a few tips, renewed my then fast evaporating confidence and one day it worked. It continued to work and has done on allsorts of different aircraft types and sizes ever since ( allright - with the occasional lapse).
What is the problem at the moment? Is it the approach or the flare or what. A bit more info might elicit a few tips from people