Insecurities

I have been with my boyfriend for 3 years. I’ve been cheated on so many times in the past so I do have trust issues.

However, I’m asking if anyone has any tips on getting over insecurities in my current relationship.

I get major anxiety over the smallest things such as a simple like of a photo of an old female friend.

I do feel as I’m childish for being like that but I can’t help it.

I don’t want to ruin my relationship because of my past. Any tips?