From someone who went through this "just work and home" and decided it'd be a good idea to "take a break" I can tell you... You're going to miss her a fuck ton more than you think. Maybe visit your family or do something where you will be away from her for a week or something and it'll hit you how much you cannot wait to see her again. Trust me dude, first 3 days I was chill, feeling good, felt like the break was going to be something good and if we broke up I'd be fine. Another 3 days and I missed her so much I was randomly thinking about hella good date idea's when she got back etc, then she hit me with the "I wanna break up" and I was legit destroyed, especially just after figuring out how much she meant to me and how much I missed her.
So just advice, I wouldn't jump straight into "Guys if you want other pussy just break up". Because if you regret it there is almost no going back. A week away will change your environment and you may realize that you really love living with her etc, you just don't realize it because it's normal.
I would suggest to start doing stuff with her like every weekend, start looking up places to visit, go visit a stream with a nice waterfall and be spontaneous, jump in the water if that's something you wouldn't normally do etc. Man I wish I had this advice before I let shit get to this stage with my ex (we won't be getting back together).
If you really want... spice up your sex life ya know, I dunno what shit you guys do, but trying something new.