here's the whole sentence : (you) Say you're leavin' on a seven thirty train and that you're headin' out to Hollywood Girl you been givin' me that line so many times it kinda gets like feelin' bad looks good
" gets like feeling bad looks good" = even feeling bad would be better than the way i'm feeling now
There is another song lyric that says "I've been down so long it looks like up to me." It means that I have been sad or or down on my luck for so long, it seems normal, or even good, to me. I think the lyrics you quoted mean that even feeling bad would be better than how I feel now.