moonpi.. can you give me more explicit insrutuctions?

i'm texting. i want to interject a web address. in the middle of my sentence i say www.blahblahblah.com for great bargains! i highlight the address completely and then click url. when i continue with my sentence, the highlight goes away. however, if i wait until the text is done, www.blahblahblah.com and then highlight and it url the highlight stays. i submit. this is what happens.