Hello and welcome to Psych Central Lauren!!! It's nice to meet you. You have joined a community of warm and caring members who will want to offer you support and advice. Yours is welcome as well.
Please feel free to contact any community liaison or moderator if you need help navigating the forums. It will take some time for your first five posts to appear as they are being evaluated and then you will be able to join chats.
I'm sorry for your struggles. In your case, all you can do is trust that your boyfriend will not cheat. Trust is hard when you've had it broken. Ask him to continue to help you trust him. Therapy as suggested already, would help greatly. Best wishes.
I look forward to seeing you around!!!