Hope is defined as the belief that something good can come from something bad. To be hopeful is to see the good in the situation or relationship. It's being future focused on where you want to go and where you want to end up, and then feeling good about it.
Hopelessness is where you really just don't believe that any good can come out of the situation. It's a bad place to be in a relationship, a marriage, at work or just in general.
Having hope in all situations that the good will come out of a situation is the right thing to do and it models the way for others.