I hate how anxious attachment affects my mental health

I'm a 17-year-old junior in high school I'm also on the mild side of the autism spectrum and have moderate ADHD and I have anxious attachment and I hate that I do it really affected how I act when someone I care about wants space or to cut me off and this also affected my mental health.

my mental health isn't good I'm not in therapy, so I feel like I have no one talk to

I will keep this short, but I met this guy back in 8th grade in September of 2022 in the nurse's office me and him became friend's and during this time I want to note I barely had any friends and I felt like during spring 2023 I considered him a close friend of mine during this time me and him played Roblox & joked around our friendship ended in 2023 and conflict happened in 2024 and also 2025 at the end of 2025 I thought we could be friend's again and got cut off in January 2026 again and there's emotional hurt on both sides and we also don't go to the same high school either. and I hope in the future me and him could be friend's again but only time will tell.

at school I have no one to speak or talk to during snack and lunch and sit by myself and I hate the feeling of being lonely and also hate feeling out of place because I have a IEP and afterschool I have friends to hang out with and I made a new discord account and new discord server to try to have a fresh start.

any advice is appreciated.