Relationship advice please!!

Me and my husband will be together 7yrs on the 12 of dec we got together when we where 15 and 16 had our first kid together when I was 18 fast forward to now we have 3 boy together a 4mo 2yr old and 4yr old I still love my husband so much I know he loves me,but lately he says he feels unloved he says he feels I dont like to be around him and that i don't want to have sex with him,,the sex has been hard lately my labor was terrible and i feel I'm still a littl scared so when we do it i do kinda close up like i dont relax I'm scared it will hurt and i feel bad...he helps with the boys so much feeds them showers them brushes there teeth this morning he was laying down we woke up at like 8am he went pee i told him i needed to shower he asked to cuddle i told him i will shower first but when i got out he kept saying he felt turn down he said dissed I felt bad but I have been sooooo tired lately and havent had time to shower in 2 days... am I terrible?how do I fix this??I love him so much and I know he loves me he takes the kids in his man cave so I can sleep early and stuff lately like I said ive been very tired lately I dont know why I will be in bed by like 9 sleepying by 10 even on the weekends I dont hug him as much as I used to I feel like I have no time or I forget sometimes and I just feel so heartbroken that I'm making him feel the way he does

"Sorry for missed spelling and terrible grammar and punctuation "