how to stay & continue to be productive personally & professionally during relationship & marriage?

Need some advice.. how to stay motivated & productive while you're in a relationship. I've been dating & engaged to my partner who i've known for over a year now. I'm an ambitious girl but sometimes i feel like just going on vacation, cuddling & sleeping with him. I love him a lot but I wanna also do well for myself & build an identity outside this relationship. Please suggest!!