#2 They express their feelings regularly. Someone who truly cares about you and wants to be with you is going to let you know. They’ll talk about how much they like you or how happy they are with you. The more they express their feelings for you, the more secure you can feel knowing they truly care.
#3 They show you they care. Instead of just telling you, they actively show you every day. They do the little things that most people may not think of like bringing you coffee in the morning or picking up your favorite snack while they were out. The more they show it, the more it should make you feel at ease.