When someone is feeling down, it's a natural human instinct to want to check on them, comfort them and try to make them feel better. So, when you're feeling down, they approach you out of the same instinct that makes you approach a friend who isn't feeling well to see what's going on and help if you can. Maybe the reason they seem uncomfortable when you're feeling blissful is because you said you are often depressed. If you mostly feel down, people may become used to that and not know how to act when you're not down. It takes some getting used to because the way someone feels affects a lot of things, from how they act to how they talk or just cary themselves. It's almost like people's personalities change with their moods. It's also possible that you yourself aren't as used to feeling more outgoing and don't know how to act. In both possibilities, you'll all be more comfortable as you feel better more often and everyone has time to adjust to the new you.

Moods can be so different that it's like meeting a new person and getting to know them, so the more time with that you, the more comfortable they will be. That means finding exactly what makes you feel less down. You'll need to pay attention to when your mood changes and consider factors, such as: an event, amount of sleep, foods you eat, etc. If you notice a pattern, you may be able to recreate a better mood. For example, if doing some activity helped, do it again. Physical and emotional health also plays a factor, so don't neglect those. Also, don't be afraid to ask others for advice. Sometimes people close to us notice things we don't about ourselves, so they may see patterns too. General advice is that mood can sometimes be affected by how we view ourselves, which means that, if you can even just increase the times you aren't feeling down by a little more often, that will give you confidence, which will increase it even more often. It's just about getting the process started.

You're lucky anybody approaches you at all. I'm largely ignored when I'm in a mentally stable state and everyone ignores me that much more when I'm feeling depressed