Why am i having wierd and bad dreams about my boyfriend and related to my mom after she ped away?

my first dream was similar like the third on but i really don't remember anything from it. ive had a few others but i don;t remeber then as well. The second dream was that i had all old friends from elementry n middle school that all knew my mom were in a plain room n i walked in n was like my mom ped away n was hesitant to tell everyone n then io woke up crying. my third dream is not really related with my mom as well as the first dream was not either but my boy friend was arguing in a parking lot with some dude n then this dude kinda stalled me n had my keys to the car so we couldn t drive away but at the same time they were still in my hands. as we were driving away i relized that the dude was doing that to get my license plate number n all my info i got scared n my boyfriend told me to calm down n everything would b ok ....we were going to somewhere to walk thru not exactly sure what it was but as we were leaving n two big scary looking black dudes ( different from the one he was arguing with in the parking lot) walked in towards were we were supose to exit from n stabbed my boyfriend n then before u know it we were outside n i then relized what had happened after he was slouched over n then he took the knife out of his gut n i woke up. it wasnt a bloody dream but the knife looked like one i have in my kitchen !