Will I Feel That Kind Of Love Again?

fake it until you make it. that is, act like you love your boyfriend.

feelings come and go (I felt hungry this morning, I don't feel hungry right now).

you can change your feelings through action. in other words fake actions of love (bake him a cake, give him a massage, etc; ) and make yourself believe that you truly are head over heels for your boyfriend.
you'll find that you feel love for him in time.

as for the same feelings for your ex. your boyfriend now is not the same person as your ex. regardless of being in boyfriend/girlfriend relationship, all relationships have their different dynamics (I can't expect to have the same kind of relationship from jane doe as I do with john smith).

no one deserves or should be in a relationship where there isn't trust and you said your ex cheated and lied. you should be in a relationship where you're treasured.