A crush?

Is it normal to have an innocent crush in a relationship? I've been with my boyfriend for a year, and I love him so so much. However, lately one of my guy friends have been kinda making me really giddy and giggly. Could it just be an innocent crush??

Also, even if I didnt have a boyfriend in could never date my friend because hes my friends ex and I wouldn't do that to her. Should I just ignore the crush??