[header] How to tell if your relationship makes you depressed [title] Be aware of your moods. [step] Notice how you feel throughout the day. Do some situations make you feel cheerful and energetic, or do you feel down much of the time? [substeps] Depression can creep up on you slowly, so it's important to be aware of whether your overall mood has changed over time. 
Know that depression doesn't necessarily involve feeling sad. Many people with depression feel empty, guilty, or irritable.