Background: my girlfriend and I have been together for several years. Recently an old ex from maybe 8 years ago reached out on Instagram. I was apprehensive as they continued their conversation but she assured me that this has been good for her because talking with him helps her recall earlier more innocent times for her, before a bunch of bad stuff happened in her life. I want to be supportive but at the same time I can't help but feel jealous an insecure. This has been going on for over a month now. Recently they have been talking on Snapchat rather than Instagram, and I see her taking pictures of things throughout the day, Starbucks and dinner and the like, and I know she's sending it to him. He lives across the country and she assures me everything is innocent and theyre just talking as friends.

I initially expressed my discomfort but my insecurities have been a source of problems throughout our relationship, so I am really trying to swallow my feelings but it's eating me up inside. Am I overreacting? Do I have any right to feel upset and if so, how do I broach the subject without it seeming like I'm just complaining?

Yes there is a big age gap that might have something to do with my insecurities and my concept of snapchat differing from hers.