From a genetic point of view, it is not considered dangerous. First-cousin marriage is often prohibited, but not second-cousin marriage. But as special says, doing so without family support will mean a long lifetime of bad relations or no relations with the family you love, and (depending on how much you love your family, of course) this might cause you long-term regret. I had a cousin who married a cousin, and they actually waited until their fathers died to marry. I thought that was sad also, but can see why they did.
In some cultures this happens and is acceptable. What does your culture say about second cousins? However, I think a bigger problem is that you do not have family support. Depending on how important that is for you, that could be the deal breaker. good luck