How can I built my parakeets’ trust?

I have two parakeets at home, I play with them, take care of them and everything,I let them out often,but a few months later,they doesn’t seems to like me around them anymore,not,at least they let me play with them, but they didn’t let me touch them .How can i biult my parakeets’ trust again?

Oh yeah,by the way,how u train your birds?I dunno how help
- Vicky