He said: "No, we won't get married, although it is wonderful to have someone
who entertains you and gets your jokes!"
Jim - who has been married twice before and has a 20-year-old daughter -
says being with Jenny has made him want to be a more reliable boyfriend.
He told US TV show 'Extra': "I'm more faithful than I ever was. Faithfulness
and truthfulness is important to me in a relationship."
Jenny - who has a five-year-old son with ex-husband John Asher - recently
said she has no plans to tie the knot with Jim.
She said: "What is marriage a guarantee of? I'll be yours forever? I'll be
faithful? Bull! It's really just a piece of paper."
Despite her reluctance to marry, Jenny says she is blissfully in love with
the 'Dumb and Dumber' actor.
She said: "He is the light of my life and we're more in love now than we
have been in our entire relationship."