Rough patches PLEASE HELP ME

1.Boyfriend wants the old me back I use to be happy all the time now I will say I can be upset and bitchy a lot.
 
2. We been dating for 3 years and I don't want the love to die, and I just feel insecure because I don't want him to get tired of me even though he says he's not
3. LOVE CAN SUCK SOMETIMES UGH