which group do I really belong to?

I found a group of friends that I really thought I would fit in with and have spent a great deal of time getting to know them. Along the friendship process one not so nice member of the larger circle of this group of friends, decided to send a degrading email to me and ever since then I find myself questioning my belonging to this group and being relunctant to fully throw myself into the group.

Years ago when I began this process of searching for my group of life long friends I began with a group that I shared mutual friends with. At that time I just didn't feel connected to this group so I moved on. But lately I've been around this group and feel connected to them in a way that feels right.

I'm at a crossroads and I really don't know what to do. My mind and my heart say two different things. I can belong to one group and hang out with the other but I can't belong to both groups. I know that I will be successful in either group and will have the life long friendship too. But if that email was never sent to me I would never question which group I belong to. And I just wonder was it fate or destiny coming in to show me that I wasn't make the right choice, or was it a test of faith and personal character that I have yet to fully pass. Or am I just thinking too much?

When it comes to things like this, I think it is better to trust my heart and not my mind. But is that the right way to think?