Just don't start the comparing game zmoore or put your ex on a pedestal. Idealising your ex will make no one else ever match up. Be realistic. Remember the things that led to your relationship failing and not just the good times.
My advice is to leave some time to grieve over your relationship and ex and make sure you are completely over your ex before moving on.
You will definately find happiness with someone again.
Good luck.
Some people are drains and some are radiators... Keep clear of the drains and hug the radiators!