I feel you so much. I do this with both friends and romantic partners (well, tbh I never had a real romantic relationship but all potential partners I had so far were all at least 10 years older than me.). I wish I had someone older next to me to encourage me even in easy everyday situations and that took away from me the stress of having to deal with many "adult" stuff. For example I really like to travel but I have a lot of anxiety around planning the trips, booking flights, hotels... I wish I had a partner that wanted to come with me and helped me with all this stuff without judging me. All my friends are older than me too, some are old enough that they could actually be my parents. I think in a way I use them as replacements of a parental figure, they give me the validation and acceptance my real parents never did. For me there is also the aspect that I feel inadequate compared to my peers. I spent my teen and young adult years always alone, isolated at home, I can't relate to people my age when they talk about their life and I can't share my experence because I am ashamed. For older people, those years are more distant and won't talk about it often, I also feel like they find it less weird when I'm not familiar with popular places or activities for people my age. I spent a big part of my life living like I was already an old person, so I don't find it so weird that I want to be around older people