Cousins

So I’ve been seeing this guy for about 5 months and have just found out that our great grandparents are half brothers which makes us 3rd cousins (I think) . What is people’s thoughts on this? Is it wrong? I am so unsure what to do. This was the first person I’ve been involved with in the past 2 years due to ptsd from an abusive 3 year relationship so the thought of ending my relationship with this person hurts so much and I’m honestly torn as to what I do about it. I’m just looking for advice please