overly or insincerely emotional
maudlin - emotional
The word ‘maudlin’ can be used to describe something that makes you feel weepy or sentimental, or to express a state in which you feel those things. It is typically used in a negatively in a social context.
The movie was entertaining overall, but did get a little too maudlin at times.
She became quite maudlin after a few drinks, and dissolved into a bout of self-pity.
As maudlin as it may sound, I believe that anything is possible if you set your mind to it.