You're not a parasite, and the people who care about you don't think you're a loser. You're okay, and it sucks that you're going through this, but nothing is wrong with you. You're just having a rough spot, which is normal and common, especially in these times. If anyone says otherwise (including or especially yourself) they're wrong.
I agree that therapy is a good idea here. If you've had trouble finding a local therapist, use the betterhelp or talkspace app - it's very easy to get connected to a therapist there.
Wishing you the best in moving forward with all this.