Many of us say things like "that isn’t possible, it’s been tried before" and we use it as an excuse to give up. Sometimes the past situation isn’t even involving us, it’s something someone else did which we use to make a decision. We often need a reminder that the past is not a test for reality. Reality is what is happening right now, it involves us and whoever we want it to involve.
Every piece of innovation on this planet likely wasn’t a first try. Facebook didn’t say "Myspace is lame so why try." People who are happily married likely had a broken heart before their spouse, they didn’t give up trying because it didn’t work the last time.
Past is not a test for reality. Learn lessons if they are applicable to you and create whatever you want to create, never let failures or anything unpleasant from the past be the reason that you give for not trying today.