Emotional health

How do I deal with my anger and anxiety? My boyfriend and I have been together for 7 months now and he's fantastic. He's super considerate of me and all I've been through but sometimes I feel like I weigh him down with all my problems. If anyone knows ways to calm down from an anxiety attack (or just stop them altogether) and how to deal with your anger please let me know. I would never ever hurt my boyfriend but I feel like a burden even though I know he doesn't complain. I don't want to be like this forever.