I have a friend who I adore but I'm not sure I can cope with. He's often lovely and supportive but I'm finding communicating with him mentally draining. I feel like he requires me to give/be more than I am and I can't keep up with it.
Everything is about him, he is always right and needs to be the loudest voice in the room and center of attention. Which doesn't really bother me on a day to day basis. If he needs that fair enough I don't care enough about what he's talking about to challenge it. However the requests for me to message him which he'll then not answer for days or maybe a week or more despite being active and messaging others and the messages that I've sent being at his request. Which I hate because often it is something that needs sorting/organising and he'll get back to me on the day before or day of and expect me to be able to magic the plans out of thin air. He often drops me if someone more interesting comes along and I don't want to allow that. I don't want them to be able to treat me as a doormat but I've no idea how to fix this.
I can't ignore him completely because he's friends with mutual friends and we attend a lot of the same groups. The other side to this is that he's often incredibly lovely to me. I feel that he may be love bombing me unintentionally and I don't know how to prevent it and reestablish boundaries.
Please tell me how to fix this without having it become a massive issue and damaging other friendships.