Life feels fake

Lately I’ve been really detached from reality. I have no idea why. Everything I experience lately doesn’t feel real. Nothing feels real and I’m starting to be concerned. And I don’t know what triggered this. I haven’t gone through anything traumatic. Like it doesn’t feel like Christmas. It’s doesn’t feel like December at all. The other day I was counting my savings in my little piggy bank and I had so much money. And it just felt fake. Like it didn’t seem like I was holding that amount of money in my hands. It almost felt like a dream kind of. The other day I had sex for the first time in like half a year and it didn’t feel real at all. I don’t know what’s happening and I’m tired all the time. I’ve been depressed for almost a year now but this is the first time I feel this “detachment” from the real world.