How do I stop being paranoid about my Bisexual girlfriend going lesbian?

Anonymous
I have a girlfriend who is bisexual. Before her two years ago I had three girlfriends who all went lesbian on me so it's kind of just a natural paranoia. How do I stop this fear and worry? We have so we love each other to the ends of this Earth but I cannot shake the feeling that she'll just go lesbian on me like my old girlfriends. The way they did it doesn't help either they were cold and ruthless about it. My current one is a great girl and claimed she would never do that but there just became this point where I don't know how to not be paranoid of this. If you're not a man it's quite a humiliating thing for all your girlfriends to go as being you start questioning yourself and asking if there's something wrong with your self. At least that's my feelings with the experiences I've had. Sorry for any spelling mistakes I'm not in a clear state of mind right now
Updates
+1 y
I forgot to add that I'm no homophobic being a bisexual man myself
How do I stop being paranoid about my Bisexual girlfriend going lesbian?
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