My best friend and I have planned a fishing trip for this weekend with 3 of his kids a few hours away from home. My friend, and I have known each other for 14 years, I go to his house every weekend, and we are really close. He has 4 kids, but the mother of the last one left him a little over a year ago because she caught him cheating, and for unrelated reasons doesn't let the child see him.

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My friend quickly found another girlfriend, and after about a half a year they split up. Last week around monday he told me he was talking to the woman he cheated with again, that she is married but leaving her husband, and he was going to take it slow with her. The very next day she told him she told her husband to get out.  Sunday they started staying at her house. Now she wants to go on the fishing trip with us, and his 3 boys.

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I helped raise the child he doesn't get to see a little more than the other 4. From the time she was 4 months old until around 2 years old I watched her during waking hours for the most part as I was staying with them, and they worked 3rd shift, and slept until the evening. I grew a really  big attachment to the baby. I just don't think I can meet the new girlfriend for the first time without being bombarded with the thought that she was part of the reason I don't get to see that baby anymore. When I do meet her I want to be able to have an escape plan, and we'll  be using my SUV to get us all to the fishing spot, so if I couldn't take dealing with her, and left then they wouldn't have a ride back.

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I don't know if I am being petty, but I definitely feel guilty for pressuring him to decide whether to have me go, or her. It really doesn't matter to me if he picks her, because I have a shit ton of housework to get caught up on. But am I being a petty asshole?