What Should I do in dating? Advice

The person I am dating usually talks to me and texts me and we used to meet frequently. Nowadays, it seems to be the fact that he stopped all that. We haven't texted in a while. The last time we texted was when I texted him when I thought I got him sick. He answered only briefly and then i replied "Oh ok just checking up to make sure." After that we stopped texting again. I don't know what to do? Should I really ask him what is wrong or would I seem like Im kissing his ass cuz I dont want to do that. :/

Should I push him out my life and just move on?

Please help me:)