i don’t think he loves me anymore

my boyfriend and i have been together two years and we have a 4 month old, and we have our own house together. for the past couple months he’s been different... he used to send me cute lil texts saying how thankful he was for me, get me my favorite candy, want to go out on dates, etc but now he is rarely affectionate w me anymore and when i tell him he just says “i’m tired”, he does work full time but it doesn’t take any energy to hold my hand or hug me... he rarely says “i love you” and when he does it sounds so nonchalant, i feel like he rarely even smiles around me anymore... it seems like he gets annoyed w me extremely easily and like everything i do annoys him now :/ idk if i’m overthinking or if it’s postpartum but i just don’t feel loved anymore and idk what to do. i think he loves me as a person but i don’t think he’s IN love w me 😞