You cannot force someone to love and care for you, or to stay in the relationship, you can only tell them what you need and ask for what you want.
couplescounselling
Creating a Monogamy Agreement for Long Lasting Fidelity – A Valentine Date Idea from your local couples’ therapist;)
While it is reasonable to ask your partner for support in the area that you feel insecure about, it is not appropriate to expect a lifelong agreement that is based primarily on unresolved fears and unhealed wounds from previous relationships.
It's Not Just You 