If you merely suppress your emotions she will learn that you are not strong...

If you merely suppress your emotions she will learn that you are not strong enough to display emotions in a masculine manner. You are signaling emotional weakness.

You should talk about something that you are passionate about, such as your beliefs, your job, your masculine hobbies, your social group/club/gang. Show her that you are complete man, alive inside yet fully incontrol of your emotions.

An occasional healthy display of your emotional energy will dispel any thoughts of weakness while reassuring her that you are capable of loving her and your children.