How to create a software licence agreement?

I am working on a small software project which is almost complete now. To deploy the application we need a software licence agreement. I have a few queries as follows:

1. Should I modify any existing End user licence agreement of some vendor?
2. or should I hire a lawyer to draft a custom EULA for our software?

If you recommend option 1, how should I do it? Are there any websites that specialize in preparing EULAs?

Our software is closed source hence I cannot use any of the GNU's licences.