I lost my sense of humor,

and with it, i also lost myself. it’s kind of complicated, but it’s been some months since i’ve started to feel this way, as if i could not be myself anymore with anybody. there is only one person with whom i can be totally goofy and careless, but even though i love her very much, the fact that i cannot be myself anymore with other people i also love makes me sad. i would like to learn how to regain the ability of conversing with someone like i do with that one person i am 100% myself with, but i always find myself having troubles with that. what do you think i should do? should i try to meet someone new? i also am quite nervous when meeting someone new, but since it wasn’t like before, i’m confident i can over come this insecurity of mine. any advice or comment is well appreciated, and please do be honest and straightforward!