Friend replaced me

Friend replaced me and it's hurt as hell. I've been there for her in her dakest hour(her sister died). We played video games, traveled together, go on parties, talked a lot, i've indroduced her to my other friends etc. I've been there for her 24/7. I don't know why, i am good and loyal friend. She doesn't call me to hang out with her and her new friends, and we hang out together and only for half an hour or hour. My self esteem is -10, i think they are smarter and funnier than me and have more to offer than me. I am depressed, angry, anxious, i think i don't deserve love, that i am boring, stupid and overall big mistake. I really miss my friend.