Having friends and still being alone...
I ask you, are you confident in what you do for a living?
Do you enjoy what your studying? Does it spark your interest?
The older I get the more I realize this fact.
We should focus on one thing and do it really well but with proper balance of other areas i.e. social, girls, etc.
If your not passionate about something than you are not 'fully' expressing yourself through something... We are just 'instruments' that channel vibrations, give off body language etc.
The expectation that friends will make you feel better is both true and false.. friends are great to chill with, relate feelings, ultimately you are a singularity in the universe.
If your still feeling alone than I suggest you look at your thought patterns and why you limit your actions and ability to enjoy yourself.
If you get caught up in trying to know a bunch of stuff about everything or pretend to 'fit' in by liking what others like they see right through you... When your passionate and genuine/honest then you act like a magnet and draw people in to your life... now the trick is not to be selfish and self serving... but to be grateful for what you have to offer and what you give to others....
People will gladly talk about themselves and their 'passions' and if your interested enough they will help you out.
The real trick....... is to follow your inherent 'value' system... anytime you deny yourself an aspect of life your interested in.... you learn nothing and it serves as anxiety/depression later on because your drawn into these situations and see that whether it's an age thing (I should know more by now) etc.. you give yourself less value = worthlessness. The source of this is all in preconceived ideas possibly by a troubled past... re-enforced un-intentionally.
(Ya my advice is basically advice id give to myself haha)
All knowledge is ultimately SELF KNOWLEDGE..... remember that.