Don't really recommend a colleague as a gf. Doesn't apply to all but a lot of new shits will happen.

Love someone for too long indeed will make it into habit, instead, its your own fault that you have neglect life with her.

You might be just started work, but your lifestyle is going towards downhill as you never really date her, instead just casually live everyday because your mindset is wrong!

You think that you own her already. That's why. Whenever you think you own something, that's where the problems come.