So it's not gonna be easy. It's going to be really hard; we're gonna have to work at this everyday, but I want to do that because I want you. I want all of you, forever, everyday. You and me... everyday.

This quote is saying that the speaker is committing to work hard on the relationship they are in. They want to be with the other person every day and forever. It is not going to be an easy task, as they need to keep putting in effort every day. The speaker if determined to make it work and make the relationship last.