Of the four actively writing, two are now published. I'm one of them and was lucky enough to get a publishing deal a year after graduating. The other one had to wait nearly ten years for her publishing deal, but she's got there in the end. The third in our group has had so many near misses - representation by top agent, discussions with editors - that I'm sure the deal will be there for her. The fourth has extremely limited time to write, but is now nearing completion.
All the four who weren't writing said they missed it. They wished they hadn't stopped. They expressed sadness that their creativity wasn't being expressed. One said that she'd been at her happiest when writing...
We often hear about people like me who get published relatively quickly, and forget that for most people it takes much longer than that. They say that it takes 10,000 hours of practice to master a skill, so why do we think writing a novel will be any different?
I wouldn't recommend plugging away if you really hated writing - that would be daft. But I think if you're still enjoying the process then don't be too impatient. Enjoy your writing, allow yourself time to develop your skills and above all, be happy.