Question about being widowed and dating?

In August of 2009 my husband of 25 years was killed by brain cancer. He was sick for about 2 years. It has been 10 months now and 2 of our daughters are engaged and our youngest is pregnant. It saddens me that he isn't here to see all of this happening but i take comfort in knowing he is always looking down on us. This past week an old friend of mine has been trying to get me to go out to dinner with him. I really want to go, but all of my kids are saying it is too soon to even consider dating. Loosing my husband last year was my second time being widowed, so I feel as if I understand how to approach dating again; yet 10 months seems so very soon. Does anyone have any input?