I am sorry you are in a situation where you feel you have to be putting yourself in this position. It is not the safest or healthiest coping mechanism, but it is one nevertheless.
The fact that you have a high-sex drive in spite of being depressed might be a good thing, at least temporarily. You might get enough dopamine to get you throughout the day, and hopefully keep you alive until you figure out how to get better in a more meaningful way.
I know that in my and few other people's case giving up on sex/affection was an indicator, and effectively contributor, to entering the CTB zone, so the fact that you still have enough energy for that might be a good sign.
This is not to say that I recommend you continue doing so. It is just to give maybe a different perspective on something that you seem to consider strictly negatively.