I say reach out to him and see what happens. It may work out, maybe not, but you need to let yourself explore this and if it doesn't work out, THEN you can finally move on. If it does, then you can either deal with the famoly fallout or keep it secret.
My 1st cousin and I are in a relationship together and our family doesn't know. I don't care and nor does he. It's not any of their business.
Actually our Father's are second cousins to each other, so I believe he and I are third cousins. I live in the states so its not illegal to date or marry, but we don't even talk anymore because everyone made a big deal out of it (laughing about it, reminding me that it's incestuous etc.) when my mother found the information out (she also believes he already knew). I wanna talk to him so badly about how I feel but I'm scared. I've tried getting over him for the past two years. Even dated others but I don't connect with them as I do him. I don't know if they're real feelings or just chemistry from the blood relation. It hurts ..
I think that makes you 2nd cousins. If I remember correctly, 2nd cousins are not biologically related. You would need to find out if you can marry where you live. If your family and culture are against it, that can be difficult to overcome. You might want to read more on that topic on this board. If there is a will, there is a way.