<human>: Could you distill the essence of the text into 1-3 sentences?

Just to get some background i'm going to be honest with you in the hope you'll hold back your judgements. I'm a dancer in a gentleman's club at the weekends. I feel like a very empathetic person who likes to listen to other's problem and help them out. Anyway last night I got chatting to a 40 year old man, we got along well, had alot in common including walking dogs and being out in nature. He was also telling me how lonely he has become in recent years, I felt sorry for him. So at the end of the conversation before he left, he said something along the lines of, hey you really lifted my spirits tonight, and I feel close to you now, mind if I take your number, so I gave it to him, thinking we'd just have a few pleasant conversations over text and that would be that, I am the type of person who can't always find the words to say no in order not to make it awkward... Anyway, this morning i woke up, got 3 missed calls and an eager voice message asking me if i'd like to go walking with him in the countryside and have a picnic. I don't know about you but spending time with a newly met stranger alone in the middle of nowhere has the possibility of spelling rape murder kidnap etc. 
I'm stuck for words as I know if i just ignore him, he will come in the club again and it will be super awkward and i will feel really bad as i do not know what to say.
Can any of you guys think of any believable excuses, or the right choice of words for me to let him down gently?
<bot>: Met a lonely middle aged man, felt sorry for him, he took my number, now he's eager to hang out in the wilderness, excuses to let him down nicely?