I dreamt that my boyfriends ex girlfriend came to the house to get something and she tried to spark up a conversation with me when she almost caught me off guard but I was fast and put a cloth to cover my face because my boyfriend didn't want her seeing who I was or even meeting me yet.
Dreams about ex-partners often indicate feelings of insecurity, jealousy, and uncertainty in the current relationship. In this dream, your boyfriend's ex-girlfriend represents a threat to your relationship. The fact that she came to your house uninvited and tried to start a conversation with you implies that she may be trying to interfere with your relationship or even win your boyfriend back.
However, your quick thinking and ability to cover your face reveals that you are aware of this potential threat, and you are trying to protect yourself and your relationship. This dream may be a reflection of your subconscious fears and concerns about your boyfriend's past and whether or not he is over his ex-girlfriend. It could be a sign that you need to communicate with your boyfriend and express your feelings about the situation to alleviate your fears.