Talk to your friends about whatever is bothering you today, do not try to deal with alone.
Whatever is bothering you today, take advantage of having good friends around you and talk it over with them. Do not feel you are being a burden or that your problems do not matter, your friends are there for you and will support you no matter what's on your mind. Do not try to deal with things alone, accept the offer of support and spend some time getting things off your chest.