I (34f) am seriously considering leaving my husband (39m) after 8 years of marriage

So as the title says, I am strongly considering leaving him. I am trying to be as objective as possible, but really need to talk it out.
We started dating when I was 20, married at 26. We are best friends. But that has its negatives. Our relationship has often felt like we are just roommates to me. There isnt much intimacy and sex is pretty boring. He doesn't treat me like I am beautiful or desirable, and efforts on my end to spice things up fall flat.
He does chores around the house, and considers those his way of showing love. This comes up whenever I bring up how I want to be treated like I am special (without having to ask). He always insists it would be easier for him to do if I just told him to.
I am very motivated and am focused on being successful at work, he has complained about and hated his last 4 jobs. I am very social and make friends easily, he has no friends and doesn't try to make any. Just me. I workout regularly and keep myself in excellent shape. He dabbles in fitness, but doesnt really stick to any plan, and also complains a bit about that. I work a full day, make all the food for us, and beg him to help with dinners. He only offers to do this the first day after I ask him to help, and then on days I am really grumpy and stressed from work.
It isn't a clear cut issue of "he beats me" "he cheats on me" "he's an alcoholic'". He's a good guy, and he loves me deeply. He just won't show it no matter how many times I ask him to.
I lately have just been craving being alone. I have men approach me and tell me I am beautiful and I wonder if I am selling myself short by staying in this relationship that seems so stagnant. We don't have kids and I daydream about getting my own place and supporting myself and starting fresh.
I realize I would be breaking his heart, and that kills me because I do love him. And I worry I am making a mistake and maybe I do have it really good and am caught up in petty things.
Any advice would be so welcome, please.
TL;DR: Husband is good guy, but won't change. I feel guilty wanting out
EDIT 1: Thanks to everyone for the sincere advice. I really appreciate everyone taking the time. For everyone suggesting the love language book: we have tried that. I feel like I have learned his love language, and he knows mine but still doesnt act on it. For everyone suggesting we have a serious talk: we have had more serious talks than I can count. He knows how I feel and what I need from him. He always promises to get better or tells me that I need to tell him when to do special things. I told him explicitly the last time that things needed to change or I was going to leave. I really don't think another talk is going to solve anything.
EDIT 2 for emphasis: I have talked to him at length about the seriousness of this. I really appreciate everyone suggesting we talk more, but please realize that we are beyond this stage. I dont want to come across ungrateful for any advice, because that is what I am here for- but please keep this in mind :)


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