confused about my ldr bf

so today is our 7 month anniversary and hes barely made any time for me. I literally had to confront him and tell him that I couldn't believe he actually forgot our anniversary and then he apologized and told me hes been stressed which I understand but if i was such a priority in his life he wouldnt have forgot. And then after I confronted him he just texted me 'happy anniverary' and nothing else more. I'm so confused about this because he used to be most sweetest most affectionate man ever and now I don't even recognize him. I still remember for our first month anniversary he wrote me a whole cute paragraph for me and even wrote me a poem and it was genuinely the sweetest thing ever. I sometimes look back on our old messages and reminisce because of how sweet and loveable he used to be. And now he doesn't even wanna hardly call me or tell me when he goes out. He tells me he does care but hes stressed because of uni and his home life and I'm trying to be understanding as possible but its really hard on me when hes clearly changed and not the person i fell in love with. I still love him so much and Im so excited to be visiting him next week even tho he doesn't seem as thrilled as me. I just dont know what to do. Like is this normal because the honeymoon phase is over? Or should I give him some time since I know he's stressed?