How to deal with a depressed partner?

[Six_Lives]

Many times I get myself caught into a relationship with someone that has depression. I want to try and help support them but I really don't know how. It's also slowly taking a toll on me as I slowly start to feel less motivated to do or help anyone.

[Snow-Girl36]

If you find it's too much to deal with, and it happens to effect you, then it may be best to be there to offer someone trustworthy to the person dealing with depression, instead of taking it upon yourself to assist them in getting over it.
Depression is hard, and comes in many different stages. Clinical depression needs to be handled by professionals, and sometimes depression does get THAT bad, without realization.

I think you should be there to reassure the person you're dating that you are there for them, and offer advice / support when they want someone to listen, or if they are having a bad day, give / do something with them to take their mind off things.
As the relationship grows, over time things get easier and we become more open with one another as people too. That way you are still doing what you can, and being there for that person, but you won't be allowing yourself to get into their mindset or let their emotions run onto you.
Also, do take space and time away from your date when you need to. Everyone needs some alone time, and some space. Be sure to focus on yourself, and keep note of your emotions, thoughts, etc. Depression is hard on everyone, not just the one going through it. So offer kind support, a listening ear, a shoulder to cry and lean on, and most of all an open heart, willing to accept and give your presence to your date whenever they need it.