More than friends?

Hello everyone. I need objective opinions. I began a new job about 2 years ago, where both males and females are employed. I am a pretty easy person to get along with, so I typically make friends easily. I am a female and oftentimes I get along with men very well. One male in particular seemed to be giving me more "attention." We share the same humor, opinions and interests. The other females pointed out that this man probably has a "crush" on me, some of them actually becoming angry because I laughed it off. I ignored it because we simply had a fun working relationship and joked around. Not to mention the man knows I am married and 20 years younger than himself. He made no obvious signs whatsoever that he was interested beyond a friendship so I felt no reason to "keep my distance" or terminate our friendship. As time has gone on, we have become very close. What began with occasional texts outside of work and a walk here and there has actually evolved into nearly daily texting, walks and other activities (even on the weekends), sharing our personal lives, interests, jokes, etc. We clearly enjoy each other's company. We are very close and know almost everything about one another. My husband is fully aware of our friendship and seems not to mind it. We work opposite shifts and rarely see each other, anyway. However, here comes the problem. As time has passed, I have realized a few things. For one, my friend is a single guy. In the past 3 years, he has gone on maybe 3 dates, all of which he had nothing good to say about them and nixed the women almost immediately. He has made little attempt to find dates or even other friends. He plans activities with me. He walks daily with me. He buys me things (sometimes expensive items). He asks for my opinions, my help, my company. He has never insinuated an interest beyond friendship, but he deliberately chooses to spend the majority of his free time with me! And he initiates conversation and hanging out about 80% of the time. Plus he sees me at work. He does have a couple other friends, but they are both male. We have all hung out together. We do get along splendidly and there is a clear "connection" between us. Obviously I enjoy his company very much, too, and am also making the choice to join him in these conversations and activities. I am just wondering what the opinion of the people in this forum is on this unique relationship. Does this guy seem interested beyond friendship? Am I completely blind and naive, or am I reading too far into this? It is beginning to nag at me simply because I feel like the amount of time we spend together has transitioned far beyond what "just friends" (be them male or female) would ever spend together. Any ideas/opinions on this would be greatly appreciated.

He's definitely not gay. Thank you for your response

If you are married the leave it alone. Trust me me and my wife are going through this right now as we speak. My best friend the man we both work with. Always went to the wife with problems of his marriage and my wife the same thing to him. Next think I no they fall for each other and start a work and internet relationship. Not caring about what's at home, just thinking they wouldn't get caught but you always do in a case like that. Remember that, your husband has his suspicions trust me cause I did and it was true, she cheated on me with my best friend. But you have a lot to lose, think hard what to do and make the right division, you married for a reason right, please don't but another man through what I'm going through.