Am I overreacting for being so upset I wasnt invited to the Bachelorette or the Bachelor Party?

I need answers asap because its next week and the week after. I'm a Trans man that struggles with the binary and falls in the middle. My fiance and I recently (7 months ago), moved in with his sister and her fiance out of our hometown. Being 45 minutes away from our families ive felt very close to my soon to be sister-in- law and her fiance and I view them as family. They recently decided to get eloped and have 10 or so people witness, and hen have a wedding party at a local park afterwards. There aren't brides maids or groomsmen because of this, but I wasnt invited to the Bachelorette or the bachelor parties. My fiance is in charge of the bachelor party and my mother in law the Bachelorette. I've recently found that the brides soon to be mother in law was even invited but I wasn't. Its hit me really deep because I've had issues my whole life with feeling outcast. I see her as a sister and I worry that maybe she doesn't see me the same now but that she might in the future and it will be too late to be involved in the wedding. Its gotten so bad that 3 days ago I almost took my life. I dont have insurance for the time being and haven't seen my therapist in weeks because of it so im struggling. I dont have anyone close enough to talk to but disconnected enough from the wedding for me to feel comfortable. Ive told both the bride and groom that i felt weird about being trans and where that would put me in a wedding situation and that there wedding had me thinking about it. They both tried to minimize there celebrations by saying they arent even taking off work, or they arent planning it, or its more like a bridal shower, but still not honestly saying sorry but i dont feel close enough to u to have u in my party. I know this all so selfish and so shallow. But I also cant help but be jealous by the people that are invited being people they dont even like that much or have talked down on prior. Why them and not me, you know? I just need to get through it but I cant help but want to at least celebrate them. I'm buying the bride an $160 tattoo that she wanted for her sleeveless dress and now im considering making her a shirt with her new last name on it. But I feel like im trying so hard and I shouldn't be, like I just need to drop it and pretend I dont care. ​