Individual form controls automatically receive some global styling. All textual "input", "textarea", and "select" elements with .form-control are set to width: 100%; by default. Wrap labels and controls in .form-group for optimum spacing.
Add .form-inline to your form (which doesn't have to be a form) for left-aligned and inline-block controls. This only applies to forms within viewports that are at least 768px wide.
Use Bootstrap's predefined grid classes to align labels and groups of form controls in a horizontal layout by adding .form-horizontal to the form (which doesn't have to be a form). Doing so changes .form-groups to behave as grid rows, so no need for .row.