Depressed

these past few days have been really hard for me.. a couple days ago i found out that the boy i've been talking to for almost a year lost feelings for me and he's been talking to another girl.. i had no idea about it until recently when i found out about it. not to mention i've been feeling so low and last night i told my mom that i was feeling suicidal and she basically kind of like kicked me out so i had to stay with my sister.. dealing with a heartbreak and now this is super hard.. and my moms therapist said that we needed to separate for a few days and i have to stay with my sister but i really don't want to. i just feel really heartbroken and sad, and i don't know what to do or how to cope with this..