How do I help my boyfriend who is going through a hard time?

Go see him, and show him you're there because you want to be. Share his day, and encourage him to hang in, and if you have some money, offer it, if circumstances allow. You will have to play it by ear, but I think he will appreciate your visit. Don't dwell on the lost job, encourage finding a better one. He is fortunate to have you, believe me, so just be yourself, at his side.

If you're sure and can prove he was fired only because his boss didn't like him, you can sue his boss for psychological damage, loss of income, and even discrimination if you're foreign or different race, minority, or whatsoever, if you win his boss will be forced to pay him compensation, loss of income and give him the job back, however, if you don't want to do that all you can do is comfort him, try to find a new job for him, prepare a romantic dinner where you both can enjoy without being disturbed, just love him and show him your love, love is such a powerful thing, it's power is limitless, so why not use it in your favor? I would strongly recommend you to sue his boss if you have the evidence, Good luck

What you could do is just call him on the phone for a chat or something and then leave the call, him thinking he wont see you till the weekend or something and then go surprise him, i wouldnt give him anything expensive because then it'll be obvious its out of pity. Just bring over both of your favorite food and just relax together, i wouldnt pry into his problems or feelings, if he wants to talk about it he will and just listen attentively, but sometimes the best way to make a guy feel better is by taking his mind of it for a while and showing him youre there for him :)

Make a nice dinner and bring it to him to share with you. Bring candles, tablecloth, etc.