I believe that we all grieve differently. And there is no reason you should feel compelled to 'sense' the presence of your departed loved one - or even experience dreams about him or her - to prove that you will continue to love each other for eternity.
Plus, when you think back on your soulmate and how they made you feel so wonderful about yourself and life in general, you are indeed having a mini-conversation with them each time. Your hearts are touching whenever, for example, a song lyric, fragrance, melody, or perhaps even a raging thunderstorm makes you remember him or her fondly.
You also honor and connect with your departed loved one each time you have a purposeful conversation with them in your head or silently ask for their guidance when you are faced with a difficult decision.
Rest assured, your soulmate will always be there for you, whether or not you 'feel' their presence with physical goosebumps or dreams.