Should I try a threesome with gf?

Me and my gf are both 19 and I am sort of bicurious. My gf is fully bi and very much into the idea of a threesome. She's mentioned it before and I at first said id be open to it, but later said I wasn't so sure. We've been together for a few years and we are eachothers first and only. Im ad mittedly pretty "possessive" when it comes to not wanting to share her in bed tho. At the same time, I do wonder what it would be like. I just dont want it to ever get out of hand where one of us finds it okay to go out and have sex on our own. I dont like the idea of an open relationship. These feelings are very conflicting as you can see and im not sure what to do about it. She claims that she's okay with staying exclusive just us, but i feel like im taking that chance away from her while also depriving myself of new experiences. At this point I dont wanna bring it up again and give her hope only to get cold feet again. I feel like itd do more damage than harm. I understand this is a sub about threesomes and people are gonna naturally want us to try it, but idk if its such a good idea. The other thought is the introduction of new partners in bed is possible diseases which is a big no no for me. If I did, how should I approach her? How can I change my own mindset? Thanks for reading, kinda just word dumping here. (Im also pretty dl about being bicurious)

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u/Shp349 — 7 days ago

19m4m Bicurious

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I'm straight man for the most part, but I'm wanting to experiment with guys, is there anyone out there willing to meet up on the dl? Not really looking for anything super intimate, just kinda wanna try some stuff. Anyone else around here like me or interested

(Reposting bc I figure the pic will grab attention)

u/Shp349 — 9 days ago