Erm...do people really change?

I read his blog. The 'sad puppy' pic was changed to 'devil' pic and now it was a 'sunset' pic. Why does within a short period of 3 mths can make a person changed so much? This is scary. At one point can say until no one can believe he can say those things, and another moment can be so nice and sweet. Of cos we would love the him now, but how long will the 'devil' pic reappears on his blog again? Under what circumstances will he go back to the hands of 'devil'?
Yes, I am really happy that he bought me 'Mashie'. Its been so long since I see a softtoy and get so happy about it. Dunoe y, it just reminds me of him. Round face. I even choose a beanie hat for Mashie cos he was wearing one yesterday when I pass him his certs. Am shocked that he will ask me out today too. Most imptly, I din even thought we had a chance to tok again like friends.
Now i am in a confusion stage. I hope to clear my thoughts soon.
Its nice to see his 'new' blog actually. :)
Good night.