Anyways Josh, I was just giving ideas. I would love to have your prospects. 
My question first off is this : Why do you feel yo are in a slump? Is it your pronblem or are you allowing your frind to hold you back? Sometimes people cling together because of a common fear and the fear seems bigger because you have some to validate your fears.
I know some people take longer to get over Long Term Relationships than others. However 6 months is a good time to move on. Its good that you are taking a step now.
What are you doing currently to get these girls? Where do you go? What tactic do you use? Its not hard to find a woman to connect with. You can connect with anyone on some level or another. So that cannot be an excuse.
What I am reading, you want to hop into another LTR. Take it easy. Try and date around man. You are 21 women really are not looking to settle down at 21 anymore. They want to have fun too. Just like you want to do.
I am not saying to bang everygirl you can, however date them. Date more than one. Its not against the law. Its ok when it is not serious. Be honest about it as well. Woman appreciate honesty. If it develops into more then cut the others off. No sweat.
AS far as Pheromones I would try:
IO – it will help you open up to others. You will get somehting similar to confidence to speak with others. Same with them. Most women are shy to. It will relax both of you to hae good communication.
IH – it will help promote a feeling of closeness and create a trusting bond, making for deep conversation. More of what you are looking for, it seems.
IS – gives you a slight confidence raise. Others enjoy being around you because of the vibe you put off.
You should also take a look at IG. It gives off a cool vibe that others respect. Girls love that kind of vibe. IG and IS make for an awesome combo.
Dude you have a good stature, seem well proportioned. You also have to try to be open to meet new women. Pheros give you an edge. The edge has been calculated at 10%. That means you have to do the other 90. That may sound like they really do not do much, but considering, most people are used to only getting a small effort from others, even giving it 40% + that 10% puts you ahead of most. Imagine after you become comfortable and can give 100%. Thats 110%. Most people cannot top that.
Anyways if you have any question just ask we are here to help! Plus everyone here loves to help!
Thanks
Andrew