Boyfriend has a tinder profile and said he uses it to make friends, I got upset and told me I was irrational. Am i?

Anonymous
So before we jump the gun and call him a cheater let me explain. I am bisexual and I discussed with my boyfriend after we became committed that I am open to fooling around with another girl. Of course he didn't object, so we started using dating sites to meet women. First we used POF and shared and account. Was successful one time and that's it. Then we started using tinder. Since tinder signs in through facebook, I agreed we can have separate tinder accounts, since I trusted him. Well he matched a girl on there who I didn't find very attractive, he started conversation with her on wed but I didn't know he was talking to her until I saw over his shoulder. I got a little annoyed and asked why he hadn't told me. He said she responds slow and they barely were talking. I always tell him when I get a match and response. Well they continue to talk and he doesn't mention me. I have to pester him to tell her about me and he finally does, reluctantly. She basically tells him it's not really her thing. He replies and says it's not the only thing he's looking for on there, he's open to make friends too. He let me read the convo, and I got aggravated and told him that he is not going to be making friends on tinder without me being involved. Now I have actually made several female friends off there, strictly platonic. We are new to the area and I'm not working as of now, so it's a good way for me to kill 2 birds with one stone. He says it's no different for him, he should be able to do the same. I disagree, because the women matching him are looking to date, not just be friends. I got upset at him the rest of the night and he said I'm mad over nothing and being irrational. I told him I thought he was on tinder for us, not just him. He basically is trying to say I'm being a hypocrite. I feel he is even lucky he has a gf who is open to this, let alone allowing him to have a tinder profile. Most girls would not in the least bit be okay with that, and typically I am not jealous.
Boyfriend has a tinder profile and said he uses it to make friends, I got upset and told me I was irrational. Am i?
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