Don't be a motherfvcking loser. I have told you it is possible, and that's what you need to put in your head. Women are shy who can't look at guys in the eyes. Some women are not shy, and they can actually look at you and smile, but 80% of them would look away and pretend they don't see you. Do they know that you exist? YES, you stupid insecure bastard! Women have eyes, man! It's you that's preventing yourself from approaching them.
Don't listen to these guys saying that going to the gym is the only solution. Getting buffed up will certainly help you out getting noticed, but that won't be everything. You need confidence in EVERYTHING. Your stride, the way you carry your body, where you look, what's in your head.
Let me give you an example. Just yesterday, I walked to some cool spot at a club with my buddy. We passed this chick who just sat there by herself. Before I noticed her, she noticed me first. As soon as I looked at her she looked away. Does this mean she's not attracted to me? **** no. As a matter of fact, that's a clear IOI that she likes me. As I walked toward her, I kept looking at her and smile even though she's not looking at me, and eventually she looked and smiled back. If she didn't look back, would that prevent me from approaching her? No.