You don't necessarily have BPD - the diagnostic criteria is pretty high and the difficulties are usually long held. Most people would be upset by what happened to you - the guy sounds like a total prat. Instead of just honestly saying he wasn't interested he pulled you along and made you feel a fool. You also said you had been drinking and were sleep deprived so no doubt your emotions were already heightened. By all means get your concerns validated by a professional but i wouldn't rush head long into therapy without good reason - DBT (the prescribed course of treatment for BPD), can take up to two years to complete and requires up to three weekly appointments. So it can't be entered into lightly.

You sound like any other 26 year old to me - confused by too much choice and high pressure, exasperated by a dating world that's increasingly fast paced and cut throat...though obviously you don't have to have anything officially 'wrong' with you to get therapy, a lot of people who are struggling turn to it for better ways to cope.

Look into it, note down the issues which seem to be concerning you most and discuss whether these are dealt with by whoever it is you manage to contact. 1-1 psychotherapy is usually advised if DBT can't be accessed.

Good luck.