Safari problems

I'm having a lot of problems with my macbook pro, and I think I have put it down to safari.

I am running safari 7.0.3, it crashes for microsoft silverlight, constantly needs to install adobe flash player (everyday), uses up all remaining app memory, then crashes when full.

I can't add to or access my bookmarks or reading list folder without getting the beach ball and having to force quit. Difficult when I am in the final stages for my degree.

Help!