To think he's just not that into me?

[jumpingbean1810]

I'm 50, been single more than not over the years. Been dating someone for last 5 months. It's been a slowburn, meeting on average every couple of weeks, mainly because both have had work, family, friend commitments but do check in by message every day. He met some of my friends at weekend which went really well, he offers to do little jobs around the house for me, asks when I'm next free etc. But... He says he doesn't want me to meet his friends yet "because he's capable of messing this up by myself without their help", he doesn't talk feelings and when I recently messaged 'miss you x' he replied 'it's only been a few days'. He's very much, let's take it one date at a time and see what happens. I'm starting to feel more invested than he is but I'm also a terrible over thinker and have made so many poor relationship choices find it hard to relax. So,
Yabu - it's been a slowburn, go with the flow and give the guy a chance
Yanbu - he sounds like he's not that into you and you need to know where you stand.
If the latter, how do I approach it without sounding needy and know when to walk away?

Sounds like he's seeing this as a more casual thing. You could just ask directly "what do you want out of this relationship?". If he gives a "let's just see how things go" response, then you know you're wasting your time.

After 5 months I'd expect to know where I stand and where things are going.

He says he doesn't want me to meet his friends yet "because he's capable of messing this up by myself without their help

This made me wonder if his friends are a bit of an embarrassment.

Thanks, yes he said his friends are quite loud and alpha male so wanted to be a bit more secure in relationship. But equally he's not really trying to invest more time, agree with @yellowsmileyface its not unreasonable to ask where he's at after 5mths as would rather not invest more into it if he's content with casual dating.