I broke up with him about two years ago. We're still friends. He sent me a sweet Valentines Day message saying happy valentines, he missed me and thanks for being a part of his life. I only wrote back saying happy valentines because I wasn't sure what to say. Sometimes I really miss him and the good times we had together but I don't want to lead him on because I don't know if I want to get back with him. Was it okay that I only wrote that? He didn't write back. Should I thank him for being in my life too? I'm worried I hurt his feelings.