hey, first off I dont think u should jump to any conclusions that u have something like social anxiety or personality disorder. A lot of guys are simply insecure around other people, in particular women. I used to be very shy and awkward in social settings and I used to get very easily attached just like you. What helped me a lot was just practice. U have to go out as much as u can and interact with anybody u have the opportunity to, however awkward/uncomfortable it may be. Social skills aren't something ur born with and it takes a lot of practice to learn and refine them if u havent been heavily socialized yet in ur life. An interesting book to consider is called "The Game" by Neill Strauss and it deals with exacly ur problem and many long lasting solutions to handeling this part of ur life.