This is a pretty dumb question but I just want to have some other girls' opinions. Last night I walked into a really crowded bar to meet some friends and as soon as I walked in these 2 girls saw me and started waving at me. This is gonna sound even dumber but I just kept walking because I wasn't sure if they were waving at me or some guy behind me. But when I did that they stopped waving and kept looking at me. They looked disappointed when I kept walking and didn't talk to them. This has happened to me before (not in the same way, but similar ways) and I usually do something stupid like not talk to them. Should I introduce myself if something like that happens again?