Hi Hanbanan,
Firstly - congratulations!
Can I ask what your country of origin is? I'm from the UK.
I applied for my Partner Visa onshore16th March 2018. I had been living with my partner for over 3 years at that point, just like you.
I completed and uploaded my medicals and police certificates in November 2018, and every 3-4 months I upload further evidence like updates on social media, invitations, mortgage applications etc.
I have only ever received the auto-email from them saying it has been a year and I'm in a queue.
There really doesn't seem to be any rhyme or reasoning behind their processing times!
Fingers crossed I get lucky soon!