To be honest, you shouldn't consider that as an issue, believe me. I don't want to sound rude or insensible, I'm only trying to help. I do not know how much followers you had before, what was the average number of stars you had on a drawing or what that person commented but really, I do not think it should matter to you. You said you started losing followers and who knows, it's probably for the best. Why? Well, people follow others because:
1- They LIKE your gallery and wanna see more from you (the best type of followers)
2- You draw alot of fanart from a popular fandom and they follow you only to see thoses drawings
3-They do "follow backs" (you followed them and to thank you, they follow you)
4- Because they're bored. (Believe me, when I gain a follower, I always check if they liked any of my stuff/ if I know them/ if they know me and often it's just random people I've never knew about who didn't even like or comment on my stuff.)

The people who unfollow you are often the type 2, 3and 4. Type two because you may not draw that much fanart of something anymore and they find you boring and type three and four because they just realized that they followed you for no reason whatsoever and they don't know/ don't care about you.
Or it can be that some people erased their account or they started unfollowing you because you were not active anymore and, again, they're bored. That's just how Colors! is.
For the likes, just keep drawing, praticing and posting good drawings and you'll slowly BUT SURELY gain in followers and likes. You just need to be patient and let the nature of life do his thing.

Final note: Don't worry, you'll be able to build up your gallery. Alot of other artist go through that phase, including me, but with work and effort, you'll be able to succeed.

:)

thanks for the advice!
i kinda went through the same thing as KCsparks, but i tried to get more followers, but sometimes i lose followers like @aqualiathefox and
@timepaladin..
can you help me?..