Complex sentence: Over time, Sharon and Rogers eventually fell in love; however, the dangerous nature of Sharon's work constantly placed a strain on their relationship, with Rogers wanting Sharon to give up her life as a S.H.I.E.L.D. agent.
Split into simpler sentences: Over time, Sharon and Rogers eventually fell in love. However, the dangerous nature of Sharon's work constantly placed a strain on their relationship, with Rogers wanting Sharon to give up her life as a S.H.I.E.L.D. agent.