Agree with tonyted, not all people 'change' with having a drink, some are even more pleasant to be around.
Chrissa, I have to agree with what most others have said, you need to find a niche for YOU, even if it is not in the evening, but something during the day that you could get interested it - good suggestion about 'classes' coming up at this time of year - maybe even flower arranging, or cookery - just something to get you out to meet new people. Don't sit and fester - get out there love, good luck!