You have an Erythromma species male, either a Red-eyed Damselfly (Erythromma najas) or a Small Red-eyed Damselfly (Erythromma viridulum).
Here are the distinguishing features.
Red-eyed Damselfly (Erythromma najas) male
Small Red-eyed Damselfly (Erythromma viridulum) male