Force yourself out of your comfort state. Make new friends. Going out alone yields better odds. I can only talk from my experience but when I was single, I would rather go out alone than with friends because I didn't have to worry about a friend not liking a place and wanting to bounce or vice versa (you can come and go to wherever as you please), having to give them rides home if I drove, them not wanting me to leave them (usually the inexperienced friends) having to be dependent on finding them when you feel like a loner in the club, and having the friend be the 3rd wheel if I'm vibing with a chick.
I remember the very first time I decided to go out alone was when I went out with 3 other friends about 6.5 years ago. I was barely 21 and wanted to have a good time with friends. We went to a club I didn't like but went because one of my friends ex wifes was there and he wanted to hook up, so he ditched me. My other friend got sour because the guy with the ex wife ditched us so he just wanted to go home and drink. I tried to convince the other guy with me to go to a bar with me but he wanted to go home. He didn't drive so I had to drive his ass all the way to south phoenix half buzzed because he didn't want to go out. It was just me alone with half a bottle of bacardi. I was new to going out and I wanted to have a good time. I was upset I was ditched but was determined to have a good time. I could have called it a night, wasted my outfit and liquor but decided to get a good buzz and go to club RIO (this was 2004 lol). Went to RIO and had the time of my life, SOLO. Danced, got #'s, even got a couple of day2's, and I didn't even have 1/10th of the verbal game I have today. Went home to my f-buddy that night bragging about my night (I was drunk and 21 and talk a lot anyway). Ever since that night, I've never been opposed to going out solo. Friends can sometimes ruin your night.
Logistics are more in your favor when going out alone also. If you click, you can just bounce with the girl and you'll be forced to open or just stand around like a loner. You're the alpha male, it's your world. You don't have to depend on anyone to have a good time. Don't put too much pressure on yourself to go out with the intent to get laid, just go out and be social, that's why people go out, if someone is acting too cool for school, just move on to the next set. It is a numbers game anyway. Be comfortable in your own skin and don't worry about what others think about you.