As Hollow said, do not get a significant other simply to say you have one, or to feel included or "normal". Doing that is unfair to your significant other, and yourself; not to mention it will doom the relationship.
You are a complete, independent, unique person, and you do not need another person to be such. If you're unhappy with yourself now and looking for someone to make you feel better, the terrible truth is that it won't... I've made that mistake myself a few times. Learn to love yourself before trying to love someone else. =)
If you still are determined that you "need" a significant other, then your best shot is either directly socializing with people who share similar interests (join a book club, go to the gym, bars, etc) or online dating. While what the others said about being unable to force finding love is true, you'll never find it if you don't ever talk to anyone.
P.S. personally, I love the word "mate" =P