and really, you have friends asking you out and even a boyfriend so i think you're doing fine :) it's okay to not want to go out ofc! we all slow down eventually; work saps a lot of energy out of us and it's understandable how you would want to just rest at home all weekend. maybe change your way of hanging out if you still feel tired? have your friends come to your house instead, just throw a pizza party at home and watch silly movies or something.
(sorry i'm not very helpful. that thing i said today about having a cooler life online than irl is true. i'm as far as cool irl as possible haha. i'm very very boring)