Advice is hard to give when you don't know hardly any facts or background.And it's not smart to give much personal information over the internet.
But that being said, many people say that you shouldn't make any major decisions until at least one years after the death of your loved one.
Be thankful it was't a divorce that separated you from him, and that you were together until the end.
At least you don't have to deal with all those questions, self analysis, and pain.
Now, depending on your health, your religion, the number of children you have, your financial situation, your greater family and friends, and your pets (all of your responsibilities); you might consider a long vacation to a different location, to really (deeply) think.
You're not too old to start again, and memories are good, but don't live a ghost of a life.
If you liked married life, you might consider trying another relationship.
But wait at least one year before you start looking.
We're not meant to live alone, but some of us do.
Read your Bible, because the answers are in there.