@asiangal555,
You are putting yourself in a difficult situation. You are making your happiness dependent on a boyfriend or girlfriend. There are two problems with that, romantic relationships are difficult anyway... you can't just magically snap your fingers into a good relationship. To make things worse, being unhappy makes it more difficult to be in a good relationship.
As far as getting a boyfriend or girlfriend (at least a good, long-term relationship), you have to be patient. Spend a lot of time meeting people, doing fun things until you find someone where there is a spark.
If you are feeling sad all of the time, you might be suffering from depression. It wouldn't hurt to go talk to a therapist. Other things that help are getting exercise, being good to yourself, and getting out with friends.
I think you should separate the two feelings. Putting yourself out socially, developing friendships and doing things you enjoy with other people will help on both of these things.