About my friends..., I just don't know what to do about them. Options

[*x____duckii*]

Lately, my friends have been ignoring me lately. At lunch, whenever I'm alone, they never even dare to ask me what's wrong and never try talking to me, and when they go to me when I'm alone, they just sing these annoying songs they know I get annoyed by. They never could tell when I'm sad. They never try to talk to me and make me feel better. I always have to be the one that tries to talk to them. Most of the time, whenever I'm saying something, they always have to end up cutting me off and ignoring me. Okay, and whenever I call them to talk on the phone, they usually make up an excuse to not talk to me such as 'I gotta go', 'I'm doing my homework right now', 'can't use the phone', 'I'm about to go to sleep', and many more excuses. It's like they're trying to avoid me. Whenever I tell them they're getting on my nerves and tell them to please stop, they never do so. But when I do something that annoys them, they always have to tell me to stop and get mad at me. Seriously, I'm thinking that I should just leave them and find some other friends, but I'm afraid that I'm might start to regret it. I really dunno what to do