Possible stress problems. Need insight!

[Niagara Falls]

so ive always been quiet and terrible at talking to girls. ive had one girlfriend, which lasted 8 months and was pretty good, but getting into a reltionship, besides that one time, has been impossible for me.

 

im average looking good build and have a huge friend circle, both male and female. i have no problem befriending girls.

 

but when i drink, i gain that ability to talk to women, and since gaining confidence after my one and only relationship, ive had quite a few "one night stands" and other random hookups with girls. i felt superiorly confident after finally having a relationship and losing my virginity and wiht the help of alcohol i was on a roll.

 

that all changed when i moved to college 2 months ago. i moved to a big city and i love it, a lot of my close friends attend college here and my life is great. Im an online poker player and spend a lot of time with it but it does not stress me out noticeably, and neither does college, i find it rediculously easy and am over experienced for my program level at the moment.

 

this is leading me to confusion as to why all of a sudden, i have no ability to talk to girls.

 

i can not flirt or even communicate well with all the new girls im now in contact with since starting college. ive had one thing with a girl which ended quickly. right afte rmy ex girlfriend rubbed in her new boyfriend to make me feel like ****. she ended up dumping him pursuing me but instead led me on and we now have NC after she randomly picked up a new boyfriend (i know shes a joke but it really caused me some emotional strain)

 

i havent gotten laid in 2 months (since 2nd week of college) and thats also starting to irritate me.

 

and the last problem is, all of a sudden when i drink, i can no longer use it as a tool to talk to women like i used to. ive always been able to control myself while drinking, and i dont drink excessively, but all of a sudden things have changed with no difference in my habits

 

ive had 3 girls interested in me in the last month, all of which ive abruptly ended contact with after telling them off rudely and randomly.

 

i dont know why its happening, all of a sudden i cant talk to girls, i get angry, and i say something stupid like telling them theyre annoying. this has lost me 3 girls who showed interest in me, and ive lost all confidence in myself. all of a sudden im starting to feel like i need a girlfriend, i miss the feeling of having one, and random hook ups are not my goal, even though i used to be so much better at it. now all of a sudden i have nothing. i dont know whats causing it but its stressing it out, now im not sure which is causing which. but im stressing out. im also stressing about trying to control my weight (im lean and weight 170lbs, but the freshman 15 has hit me and im getting a gut which mentally stresses the hell out of me. i can not keep with my old work out schedule since moving to college even though I have the time, i just have no will to be my old self anymore)

 

if anyone can help, please post