Relax and enjoy doing whatever you want--at your own pace.
Will you be lonely? If you're not comfortable being by yourself, then maybe. I enjoy my own company, so a solo trip is not a problem. Just know that you're not the only solo at WDW. Maybe look on the DISMeets board and meet up with some fellow DISers.
I have a kind of personal question. If you follow advice and are looking to make friends, why go alone in the first place?
I was in the Magic Kingdom, MGM and Downtown Disney alone due to business trips to Orlando. The meeting was at the Contemporary and you are able to buy 1/2 day cheap tickets so I was "forced" go alone
I'm not a very good alone traveller, however, I had a BLAST in MK. I really enjoyed making my own decisions as to what to do and didn't have to compromise on rides. The only thing I wasn't happy with was being alone on the busses with all the families and I was bored in MGM after riding Aerosmith and TOT. Shopping was also fine in DTD and I ate dinner at Wolfgang Pucks counter service which was fine too, but I did have something to read.
Have a great time and be good to yourself, eat drink and be merry!
I love goin to Disney solo, Ive gone 3 trips now solo (Disneyland). I can do what I want when I want without anyone tellin me what to do or what rides to go on.
I havent been to wdw yet though but i plan on goin for the first time in April and plan on goin solo and havin a blast