Starting to feel off..

Hi everyone..I’m a 24 year old mom of 2 ages 5 years old and 4 month old! I’m engaged to my best friend who i’ve been with for 9 years..Lately i have noticed myself feeling distant and upset & I can’t really seem to get exactly why. I feel like I should be happy at this time in my life. I honestly have no friends it’s hard for me to usually open up and it’s kind of difficult to meet real genuine people. Starting to feel like i don’t know what to do with myself