<human>: My significant other (I'll call her Jane) and I have been seeing each other for about five months now. I say significant other because we are not technically dating because she says she isn't ready for a committed relationship yet. I understand this as she recently went through a hard time that really affected her. We act like we're dating and my friends know we have a thing. We are being exclusive to each other and respect each other's feelings. I've known her for quite a long time, but I became close to her just a year ago and I've helped her through her hard times.

She met a guy (call him Roy) about the same time that Jane and I started talking a lot. She and Roy have gotten to become very good friends and they both enjoy watching sports and hiking very much (their basis on their friendship). Roy, at one point, has confessed his feelings but Jane told him that she was not interested, they had a little hiccup in their friendship but soon resumed.

The problem is that Jane likes to hang out one on one with Roy somewhat often. For example, they go to bars, go watch sports at the stadium, and on occasion go hiking/backpacking. I've voiced my opinion on the bars in that I don't feel comfortable with the fact that Jane is going out to bars because when shes drunk she becomes very touchy. She understands this and respected my feelings. The sports thing does not bother me so much as they're just having fun watching sports (and I feel like any uncomfortable feelings would just be me being jealous). They've gone hiking/backpacking together once with a group and shared a tent (she was hesitant on telling me about the shared tent which I find a little weird). Now they've planned a two day long backpacking trip with just the two of them. I've told her I feel really uneasy about the trip because it is just the two of them for two days. She tells me I have nothing to worry about because they're just friends and she has no interest. What should I do? How should I deal with this? Am I being unreasonable?

Could you distill the essence of the text into 1-3 sentences?
<bot>: My significant other is planning a two day backpacking trip with a guy friend that once likes her (and might still like her), just the two of them, and I am uncomfortable with the idea. What should I do?