Giving up on husband, going to sperm bank!

I know this probably sounds harsh by the headline, but my husband is not very sexual & it’s making the TTC journey very frustrating. We barely have sex as is, forget during the fertile window. It just causes fights every month. He already has 2 much older kids so even though he says out loud to everyone he wants a baby with me, he never does anything about it. I feel like he doesn’t really care. I’m already 37, he’s 40, and he is getting deployed this fall so we have no time to waste. At this point I’m thinking of making an appt at a fertility clinic and having them help me with donor sperm. I’m not willing to live as a childless stepmom for the rest of my life and I don’t think he gets that. 😭 And I know this is on me too, but I feel this wall between us. I want to have sex with my husband whenever I want!!! I just don’t feel like this is the case.