I am currently experiencing something similar. Also, I'm new too so I know how much courage it takes to spew your thoughts on a forum when you're used to keeping them inside you.
The past month has been crap. I've just..flopped. I will try to offer some tips, but I guess we're both stuck in this rut.
Always tired? Yes. I've found it nearly impossible to get out of bed every morning. I think the best thing to do is give yourself a routine; I usually go "Ok, now we're going to stand up, get ready and go to the gym" or "Ok, let's get up and finish your studying before school starts". Just giving yourself tiny goals gives you tiny pieces of satisfaction - like how I got out of bed this morning before my alarm rung.
I totally get it with friends and stuff. I used to be the kind and always willing to help, and I would smile and actually engage in conversation. Now I sometimes just sit with my friends saying nothing, not smiling, not joining in. It's gotten to the point where my friends have noticed. I find it hard to engage in conversations with them, and would much rather fall asleep. Best thing for this is to say to them, I'm having a crap few weeks, so they understand you aren't yourself.
Urge to cry: literally anything will make me cry right now. I sit down at my desk to do an assignment and just start crying. Best thing for this is to cry yourself out, then have a long drink of water. Don't stop yourself from crying.
I also feel like I'm failing everyone. I used to be the life of the party and now I barely have enough energy to smile at my friends. I just want to go back to last month, or last year. My self-esteem has fell into an abyss and I'm trying to diet because maybe getting more attractive will bring it back up, when really my low self-esteem is a result of feeling like I flopped exams and not being a nice person to be around.
I come home and I barely talk at home. My family don't know whats wrong, it's just I don't want to talk.
Find something to look forward to, I guess. I have a concert coming up and it's like a beacon of light.
Basically, I totally get it. We're both going through this crap time, and can't figure out how to get back to happiness. I don't want to be a hypocrite, so I'm not going to offer anything fake or something I'm not doing.
Right now, best thing to do is rant. Make a blank document, turn your font colour to white and just spew all over the page. We'll get through this together.
Keep trudging forward.