first of all:
there is nothing to be ashamed of there, humans are social beings, we are all dependend on others, phisically and emotionally!

I'm very sorry to hear that your friends can't really understand you...
but still, even if your friends can't help you DIRECTLY, they are still valuable for distracting you (which i have mentioned before) and giving you joy.
and often you need to force yourself to do something, to feel joy in some way.
when my friends ask me to come over to a drink, i'm often thinking "baaaah, i don't want to" but i know that i will enjoy the evening when i'm at it.

since your friends can't help your directly, you may consider goingto a therapist. have you already tried it? i'd say that a therapist can help you in coping with your problems much much more than anyone here could, but of course that's a big step to take

everyone needs the other half to be complete, but you don't need it to be happy (at least not for the "lower" stadiums of happiness)
In my opinion love is more a coincidental thing, for true love needs time, and pursuing love means rushing in it so NOT giving it enough time (but maybe my viewings are really too old-school^^)

i'd like to add here that i'm not a native english speaker so the messages tend to being imprecise or may not be very "pleasant to read" (I've just read my previous message again where the sentences start like "you must, you must not, i want you)
that happens because i need lots of time to write this and have forgotten the previous sentences in the process or i'm just too dumb to connect the thoughts together
so i'd like to apologize for my "cold" writing
oh, i forgot...