Overcoming jealousy

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I am nearly at 90 days, and my whole life has changed for the better. One thing is kind of messing it up though. I have a great and beautiful girlfriend that I really love, but I found that my attachment issues came with me on the nofap journey. I kind of hate when she wants to hangout with anyone but me, even though I will want to hangout with my friend over her some days myself! I recognize how wrong this is but I literally cannot stop feeling this way. My logical side trusts her 100%, and I feel like she loves me, has said she loves me, but I get really emotional sometimes and start thinking that she is going to leave me. It drives me nuts, and it frankly ruins my evenings. I should be finishing my presentation but I cant stop thinking about how she takes 15min to open my snapchat, but Facebook says she was on messenger 7min ago. I cant help but check. I never act controlling, and keep these feelings to myself, but it drives me nuts.

I feel pretty confident in what I know I am good at, but I also recognize when someone is better looking than me, or funnier etc.. I dont think its insecurity, just being rational. But then again, I would never say to her that I am the best, I dont have the confidence to say that.

I just love her so much and I feel like I would be crushed if she hurt me or left, so maybe it is just fear?

I hear other people talking in school etc, and it seems like guys usually dont act like this too much in relationships, so I feel like I am the only one.