Hi &^%
I agree with Munchroom/Nay, I think you should go to the doctor. Maybe you could book a morning off work to go, or just a couple of hours. He/She can see how mild or severe your depression is and then according to that suggest if you should go on anti-depressants or not, and suggest other things that could help. Luckily, I've overcome the worst of my depression, but I found that a combination of going to a counsellor, having Cognitive Behavioural Therapy and taking a low dose of anti-depressants is the best thing you can do to try and fight depression.
The counselling can give you someone to talk to (and you have people to talk to on this website!) and somebody to advise you, the cognitive behavioural therapy (which is mostly free I think - especially computerised cognitive behavioural therapy) can sort out negative thoughts that I think most people with depression suffer from and obviously the anti depressants help the chemical inbalance in your brain that causes depression :) I would definately look into trying to find a counsellor who you can see for free and at a time convienient for you (The doctor can refer you, mine did) and definately look at CCBT, or maybe help groups - then you could talk to more people who are going through what you are going through.
And with your partner, maybe he has noticed you feeling depressed and isn't sure how to approach you about it, its not the best way to stop talking to you, but I think he might just be worried about you. Sorry for waffling on lol

but if you feel you need to talk someone, just message me :)
Hope you're okay xx