Ahem... As a married woman I can assure everyone that not all girls are like that...
I don't watch "sappy love movies", or wear flip-flops, let alone leave them anywhere. I love metal, possibly more than my husband. I do not incessantly ramble about clothes, drama or hair dye (diets? well, sort of, I ramble about workouts...) I don't have any "rubber band pony tail holder thingys" to leave anywhere (in fact, my husband is the one who has a hair band to tie up his hair when he trims his beard...) I never use the things... I do not leave clothes all over the floor, nor do I have "make-up and beauty paraphernalia" everywhere...
And I know other girls and women who are also like that.
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To answer the original post:
Your life may be better with a significant other, if your main problem is loneliness. However, having someone else will not make your social phobia go away. It may, in some cases, (as in mine) give you a little more confidence, but the anxiety will still be there.