I found several cute gifs of him getting teary throughout the series.  https://roswellnmsource.tumblr.com/post/187256223608/michael-guerin-crying-or-getting-teary-eyed?_branch_match_id=1007852489193383337&_branch_referrer=H4sIAAAAAAAAAxXGSw6AIAwFwBOVbnTjbWqtSMLHlEeU2xtnNRdw941ZEDDKnj1oK%2BytP5ZzLb0NV%2BOS9BLLFId5qqQ%2BU43UnKIBf2Hik2zawbJqEigWec8PYV9B1l4AAAA%3D