The 35-year-old cage-fighter - who has reportedly been told to leave the marital home he shares with his wife - fought against the former glamour model announcing the end of their 11-month union last week and is still hopeful they can get their relationship back on track.
He said: "I still want to save my relationship. I`m in bits over this. I`m still wearing my wedding ring - maybe I`m a hopeless romantic, but there you go.
"I want to work on our marriage. Maybe I am an optimist, but I believe in doing the honourable thing."
Despite his optimism, Alex admits he is struggling to cope with the situation but stillwants to give Katie, 32, his full attention.
He told Star magazine: "I am feeling very emotional. It has not been the easiest week. It is all very upsetting.
"Despite us both being busy with other things in our life, I have always made time for my wife. I would sacrifice anything to spend time with her. She has always been my priority."
As well as trying to repair his marriage, Alex is throwing himself into his attempts to launch an acting career and is relieved work offers him a sanctuary from his marital woes.
He said: "I am really happy to have my acting to focus on at the moment. It is escapism to be able to step into another role, and it takes my mind off everything else that is going on in my life at the moment."
Meanwhile, Katie`s first husband, singer Peter Andre - the father of her youngest children, Junior, five, and three-year-old Princess Tiaamii - is worried about the impact his former spouse`s relationship woes will have on their kids.
He wrote in his column for new! magazine: "Everyone keeps asking me what I think about my ex-wife and her husband splitting up. All I will say is that, as always, my main concern is for my children and I am doing everything in my power to give them as stable an upbringing as possible.
"All I care about in this situation is my kids."
Katie - who also has eight-year-old son Harvey from an earlier relationship - is believed to have offered Alex a £250,000 settlement to end their marriage, but he has asked for more from her.