Hi JWTBN, firstly I'd say that "boring" can be a bit subjective e.g. if there's particular T.V. programmes you like, films, books or music you've enjoyed and you find someone who really likes the same, THEY aren't going to think you're boring.
It does sound like you personally want more though, so see your recent thoughts as a GOOD thing and the impetuous to bring a bit more into your life or to just make some simple changes. And you really can be on your own IF you want with a lot of activities and interests. Maybe just finding something you're passionate about will make you feel better about yourself and gradually about feeling better with others??
You know you can do activities on your own BESIDES others as well e.g. swimming, going to the gym, then you've always the option WHEN you're ready of starting a casual conversation and making it more.
I'm not so sure everybody wants someone to be "fun" around them all the time anyway. Sometimes it's even better to just enjoy someone's company and have a "nice" time with them. So don't worry if you aren't the kind of person right now who's going to be "fun". Maybe that will come, maybe you're just the type of person who's got even better qualities than being "fun", EVEN if you aren't seeing them in yourself right now!!
And self-confidence..........? Well, maybe a little work on that??

Ugly is SO (big letters!!) subjective, as is ****** personality!! You know that, right!! And I for one am not going to believe it
Fine if you want to make the odd change to your personality/outlook/perspectives go for it but absolutely DON'T sell yourself short. There's SO often a LOT more to people than they believe.
Alison